Padlocks are portable locks usually with a shackle that may be passed through an opening (such as a chain link , or hasp staple) to prevent use , theft , vandalism or harm .
85-645: The term padlock is from the late fifteenth century. The prefix pad- is thought to be related to the Latin ped which may refer to the portability of a padlock; it is combined with the noun lock , from Old English loc , related to German loch , "hole". There are padlocks dating to the Roman Era, 500 BC – 300 AD . They were known in early times by merchants traveling the ancient trade routes to Asia, including China. Padlocks have been used in Europe since
170-469: A decree by which new and inventive devices had to be communicated to the Republic in order to obtain legal protection against potential infringers. The period of protection was 10 years. As Venetians emigrated, they sought similar patent protection in their new homes. This led to the diffusion of patent systems to other countries. The English patent system evolved from its early medieval origins into
255-418: A chain could be attached to the lock body to prevent the lock from getting lost or stolen. Cast heart locks were very popular with railroads for locking switches and cars because of their economical cost and excellent ability to open reliably in dirty, moist, and frozen environments. Around the 1870s, lock makers realized they could successfully package the same locking mechanism found in cast heart locks into
340-453: A company helping another company to create a patented product or selling the patented product which is created by another company. There is also inducement to infringement, which is when a party induces or assists another party in violating a patent. An example of this would be a company paying another party to create a patented product in order to reduce their competitor's market share. This is important when it comes to gray market goods, which
425-426: A disk rotated by the key enters a notch cut into the shackle to block it from moving) or lever tumblers (where a portion of the bolt that secures the shackle enters the tumblers when the correct key is turned in the lock). Padlocks with integrated locking mechanisms are characterized by a design that does not allow disassembly of the padlock. They are usually older than padlocks with modular mechanisms and often require
510-429: A more economical steel or brass shell instead of having to cast a thick metal body. These lock shells were stamped out of flat metal stock, filled with lever tumblers, and then riveted together. Although more fragile than the cast hearts, these locks were attractive because they cost less. In 1908, Adams & Westlake patented a stamped & riveted switch lock that was so economical that many railroads stopped using
595-453: A more secure alternative to the prevailing smokehouse and screw locks. These locks had a cast iron body that was loaded with a stack of rotating disks. Each disk had a central cutout to allow the key to pass through them and two notches cut out on the edge of the disc. When locked, the discs passed through cut-outs on the shackle. The key rotated each disk until the notches, placed along the edge of each tumbler in different places, lined up with
680-403: A non-obvious inventive step. A patent is requested by filing a written application at the relevant patent office. The person or company filing the application is referred to as "the applicant". The applicant may be the inventor or its assignee. The application contains a description of how to make and use the invention that must provide sufficient detail for a person skilled in the art (i.e.,
765-521: A nuisance by local authorities. padlock#English Too Many Requests If you report this error to the Wikimedia System Administrators, please include the details below. Request from 172.68.168.150 via cp1114 cp1114, Varnish XID 973682737 Upstream caches: cp1114 int Error: 429, Too Many Requests at Thu, 28 Nov 2024 11:03:10 GMT Patent A patent is a type of intellectual property that gives its owner
850-417: A patent covers or the "scope of protection". After filing, an application is often referred to as " patent pending ". While this term does not confer legal protection, and a patent cannot be enforced until granted, it serves to provide warning to potential infringers that if the patent is issued, they may be liable for damages. Once filed, a patent application is "prosecuted" . A patent examiner reviews
935-471: A patent. In the United States, however, only the inventor(s) may apply for a patent, although it may be assigned to a corporate entity subsequently and inventors may be required to assign inventions to their employers under an employment contract. In most European countries, ownership of an invention may pass from the inventor to their employer by rule of law if the invention was made in the course of
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#17327917907041020-511: A prohibited act that is protected against by the patent. There is also the Doctrine of Equivalents. This doctrine protects from someone creating a product that is basically, by all rights, the same product that is protected with just a few modifications. In some countries, like the United States, there is liability for another two forms of infringement. One is contributory infringement, which is participating in another's infringement. This could be
1105-400: A right to make or use or sell an invention. Rather, a patent provides, from a legal standpoint, the right to exclude others from making, using, selling, offering for sale, or importing the patented invention for the term of the patent , which is usually 20 years from the filing date subject to the payment of maintenance fees . From an economic and practical standpoint however, a patent
1190-403: A sliding shackle into the holes machined into the body. This style of padlock was both strong and easy to manufacture. Many machined body padlocks were designed to be disassembled so that locksmiths could easily fit the locks to a certain key. The machined body padlocks are still very popular today. The process of machining allows many modern padlocks to have a "shroud" covering the shackle, which
1275-513: A third party, without authorization from the patentee, makes, uses, or sells a patented invention. Patents, however, are enforced on a national basis. The making of an item in China, for example, that would infringe a US patent, would not constitute infringement under US patent law unless the item were imported into the US. Infringement includes literal infringement of a patent, meaning they are performing
1360-555: A unified procedure for filing patent applications to protect inventions in each of its contracting states along with giving owners a 30-month priority for applications as opposed to the standard 12 the Paris Convention granted. A patent application filed under the PCT is called an international application, or PCT application. The steps for PCT applications are as follows: 1. Filing the PCT patent application 2. Examination during
1445-593: A wider range of uses than padlocks because they have a variable length of the locking mechanism, only limited by the length of the cable. When the cable is bent and passed through the hole, it can be locked to the desired length. A quantitative measure of a padlock's tensile strength and resistance to forced and surreptitious entry can be determined with tests developed by organizations such as ASTM , Sold Secure (United Kingdom), CEN (Europe), and TNO (The Netherlands). Images of closed padlocks (sometimes physical padlocks) are sometimes used to indicate that something
1530-477: A yearly basis. Some countries or regional patent offices (e.g. the European Patent Office ) also require annual renewal fees to be paid for a patent application before it is granted. In the US, patent maintenance fees are due on 3.5, 7.5 and 11.5 anniversaries of the patent issuance. Only ca. 50% of issued US patents are maintained full term. Large corporations tend to pay maintenance fees through
1615-506: Is patentable subject matter from country to country, also among WTO member states. TRIPS also provides that the term of protection available should be a minimum of twenty years. Some countries have other patent-like forms of intellectual property , such as utility models , which have a shorter monopoly period. The word patent originates from the Latin patere , which means "to lay open" (i.e., to make available for public inspection). It
1700-419: Is a shortened version of the term letters patent , which was an open document or instrument issued by a monarch or government granting exclusive rights to a person, predating the modern patent system. Similar grants included land patents , which were land grants by early state governments in the US, and printing patents , a precursor of modern copyright . In modern usage, the term patent usually refers to
1785-405: Is an extension of the body around the shackle to protect the shackle from getting sheared or cut. In the early 1920s, Harry Soref started Master Lock off with the first laminated padlock. Plates that were punched from sheet metal were stacked and assembled. Holes that were formed in the middle of the plates made room to accommodate the locking mechanism. The entire stack of plates, loaded with
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#17327917907041870-597: Is better and perhaps more precisely regarded as conferring upon its proprietor "a right to try to exclude by asserting the patent in court", for many granted patents turn out to be invalid once their proprietors attempt to assert them in court. A patent is a limited property right the government gives inventors in exchange for their agreement to share details of their inventions with the public. Like any other property right, it may be sold, licensed, mortgaged , assigned or transferred, given away, or simply abandoned. A patent, being an exclusionary right, does not necessarily give
1955-449: Is even more pronounced when the number of patent applications is normalized by the country's population each year, or when the country of origin rather than country of filing is used. For the US, the population-normalized peak in patenting occurred in 1915, and the number of subsequent patents induced per patent has been mostly declining since 1926. A study of 4,512 patents obtained by Stanford University between 1970 and 2020 showed that
2040-726: Is evidence that some form of patent rights was recognized in Ancient Greece in the city of Sybaris , the first statutory patent system is generally regarded to be the Venetian Patent Statute of 1474. However, recent historical research has suggested that the 1474 Statute was inspired by laws in the Kingdom of Jerusalem that granted monopolies to developers of novel silk-making techniques. Patents were systematically granted in Venice as of 1474, where they issued
2125-412: Is no longer a key in the traditional sense, but is unlocked through mobile phone Bluetooth , near-field communication (NFC), and fingerprint. Unlike active electronic padlocks, passive electronic padlocks do not require electricity which makes their use environment more extensive. The passive electronic lock can be unlocked with an electronic key which needs to be programmed. Steel cable padlocks have
2210-623: Is patentable. Patentable material must be synthetic, meaning that anything natural cannot be patented. For example, minerals, materials, genes, facts, organisms, and biological processes cannot be patented, but if someone were to apply an inventive, non-obvious, step to them to synthesize something new, the result could be patentable. That includes genetically engineered strains of bacteria, as was decided in Diamond v. Chakrabarty. Patentability also depends on public policy and ethical standards. Additionally, patentable materials must be novel, useful, and
2295-674: Is secure or inaccessible. A widely known example is on the Web , where data in secure transactions is encrypted using public-key cryptography ; some web browsers display a locked padlock icon while using the HTTPS protocol. Love locks are physical padlocks attached to fixtures such as bridges, gates, and monuments by sweethearts to declare their love for each other is permanent. This practice perhaps originated in Serbia . In some popular tourist locations, huge numbers of such padlocks are treated as
2380-436: Is sent by the patent office, or the patent application is granted, which after the payment of additional fees, leads to an issued, enforceable patent. In some jurisdictions, there are opportunities for third parties to bring an opposition proceeding between grant and issuance, or post-issuance. Once granted the patent is subject in most countries to renewal fees to keep the patent in force. These fees are generally payable on
2465-547: Is the Paris Convention for the Protection of Industrial Property , initially signed in 1883. The Paris Convention sets out a range of basic rules relating to patents, and although the convention does not have direct legal effect in all national jurisdictions, the principles of the convention are incorporated into all notable current patent systems. The Paris Convention set a minimum patent protection of 20 years, but
2550-463: Is therefore only useful for protecting an invention in the country in which that patent is granted. In other words, patent law is territorial in nature. When a patent application is published, the invention disclosed in the application becomes prior art and enters the public domain (if not protected by other patents) in countries where a patent applicant does not seek protection, the application thus generally becoming prior art against anyone (including
2635-434: Is when a patent owner sells a product in country A, wherein they have the product patented, then another party buys and sells it, without the owner's permission, in country B, wherein the owner also has a patent for the product. With either national or regional exhaustion being the law the in country B, the owner may still be able to enforce their patent rights; however, if country B has a policy of international exhaustion, then
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2720-589: The Nagoya Protocol to the Convention on Biological Diversity and its system of Access and Benefit-Sharing . Representatives of Indigenous peoples view the GRATK Treaty as a "first step towards guaranteeing just and transparent access to these resources." Before filing for an application, which must be paid for whether a patent is granted or not, a person will want to ensure that their material
2805-475: The U.S. Congress was passed on April 10, 1790, titled "An Act to promote the progress of useful Arts". The first patent under the Act was granted on July 31, 1790, to Samuel Hopkins of Vermont for a method of producing potash (potassium carbonate). A revised patent law was passed in 1793, and in 1836 a major revision was passed. The 1836 law instituted a significantly more rigorous application process, including
2890-465: The WIPO Treaty on Intellectual Property, Genetic Resources and Associated Traditional Knowledge (GRATK Treaty) mandating patent disclosure requirements for patents based on genetic resources and associated traditional knowledge from being granted. The Treaty contemplates revocation for patents incorrectly filed. The treaty, and in particular its planned extension, is seen as complementing
2975-762: The World Trade Organization (WTO) being particularly active in this area. The TRIPS Agreement has been largely successful in providing a forum for nations to agree on an aligned set of patent laws. Conformity with the TRIPS agreement is a requirement of admission to the WTO and so compliance is seen by many nations as important. This has also led to many developing nations, which may historically have developed different laws to aid their development, enforcing patents laws in line with global practice. Internationally, there are international treaty procedures, such as
3060-493: The keyhole . The key pulled the locking bolt open against a strong spring. Padlocks that offered more key variance were the demise of the screw lock. Improved manufacturing methods allowed the manufacture of better padlocks that put an end to the Smokehouse around 1910. Around the middle of the 19th century, "Scandinavian" style locks, or "Polhem locks", invented by the eponymous Swedish inventor Christopher Polhem , became
3145-575: The 18th century through a slow process of judicial interpretation of the law. During the reign of Queen Anne , patent applications were required to supply a complete specification of the principles of operation of the invention for public access. Legal battles around the 1796 patent taken out by James Watt for his steam engine , established the principles that patents could be issued for improvements of an already existing machine and that ideas or principles without specific practical application could also legally be patented. The English legal system became
3230-583: The Jorvik Viking settlement, dated 850 AD. Smokehouse locks, designed in England , were formed from wrought iron sheet and employed simple lever and ward mechanisms. These locks afforded little protection against forced and surreptitious entry. Contemporary with the smokehouse padlocks and originating in the Slavic areas of Europe, "screw key" padlocks opened with a helical key that was threaded into
3315-835: The UK, substantive patent law is contained in the Patents Act 1977 as amended. In the United States, the Constitution empowers Congress to make laws to "promote the Progress of Science and useful Arts ...". The laws Congress passed are codified in Title 35 of the United States Code and created the United States Patent and Trademark Office . There is a trend towards global harmonization of patent laws, with
3400-545: The US, plant breeders' rights are sometimes called plant patents , and utility models and Gebrauchsmuster are sometimes called petty patents or innovation patents . The additional qualification utility patent is sometimes used (primarily in the US) to distinguish the primary meaning from these other types of patents. Particular types of patents for inventions include biological patents , business method patents , chemical patents and software patents . Although there
3485-445: The applicant) who might seek patent protection for the invention in those countries. Commonly, a nation or a group of nations forms a patent office with responsibility for operating that nation's patent system, within the relevant patent laws. The patent office generally has responsibility for the grant of patents, with infringement being the remit of national courts. The authority for patent statutes in different countries varies. In
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3570-530: The benefits of using each other's patented inventions. Freedom Licenses like the Apache 2.0 License are a hybrid of copyright/trademark/patent license/contract due to the bundling nature of the three intellectual properties in one central license. This can make it difficult to enforce because patent licenses cannot be granted this way under copyright and would have to be considered a contract. In most countries, both natural persons and corporate entities may apply for
3655-400: The course of the 20th and 21st centuries, however, disparity is still prevalent. In the UK, for example, only 8% of inventors were female as of 2015. This can partly be attributed to historical barriers for women to obtain patents, as well as to the fact that women are underrepresented in traditionally "patent-intensive" sectors, particularly STEM sectors. Marcowitz-Bitton et al. argue that
3740-654: The establishment of an examination system. Between 1790 and 1836 about ten thousand patents were granted. By the American Civil War about 80,000 patents had been granted. In the US, married women were historically precluded from obtaining patents. While section 1 of the Patent Act of 1790 did refer to "she", married women were unable to own property in their own name and were also prohibited from rights to their own income, including income from anything they invented. This historical gender gap has lessened over
3825-647: The extent of the exclusive rights vary widely between countries according to national laws and international agreements. Typically, however, a patent application must include one or more claims that define the scope of protection that is being sought. A patent may include many claims, each of which defines a specific property right. Under the World Trade Organization 's (WTO) TRIPS Agreement , patents should be available in WTO member states for any invention, in all fields of technology , provided they are new , involve an inventive step , and are capable of industrial application . Nevertheless, there are variations on what
3910-647: The first modern patent system that recognised intellectual property in order to stimulate invention; this was the crucial legal foundation upon which the Industrial Revolution could emerge and flourish. By the 16th century, the English Crown would habitually abuse the granting of letters patent for monopolies . After public outcry, King James I of England (VI of Scotland ) was forced to revoke all existing monopolies and declare that they were only to be used for "projects of new invention". This
3995-630: The foundation for patent law in countries with a common law heritage, including the United States, New Zealand and Australia . In the Thirteen Colonies , inventors could obtain patents through petition to a given colony's legislature. In 1641, Samuel Winslow was granted the first patent in North America by the Massachusetts General Court for a new process for making salt. The modern French patent system
4080-404: The full term, while small companies are more likely to abandon their patents earlier, even though the due fees are ca. 5 times lower for small businesses (microentities). The costs of preparing and filing a patent application, prosecuting it until grant and maintaining the patent vary from one jurisdiction to another, and may also be dependent upon the type and complexity of the invention, and on
4165-510: The gender gap in patents is also a result of internal bias within the patent system. The number of patent applications filed each year has been growing for most countries although not smoothly, and jumps in activity are often observed due to changes in local laws. The high number of patent families for Spain in the 1800s is related to the superior preservation and cataloguing of the data by Spanish Patent and Trademark Office compared to other countries (see 1836 U.S. Patent Office fire ). The US
4250-502: The international phase 3. Examination during the national phase. Alongside these international agreements for patents there was the Patent Law Treaty (PLT). This treaty standardized the filing date requirements, standardized the application and forms, allows for electronic communication and filing, and avoids unintentional loss of rights, and simplifies patent office procedures. Sometimes, nations grant others, other than
4335-415: The invention be exploited in the jurisdiction it covers. Consequences of not working an invention vary from one country to another, ranging from revocation of the patent rights to the awarding of a compulsory license awarded by the courts to a party wishing to exploit a patented invention. The patentee has the opportunity to challenge the revocation or license, but is usually required to provide evidence that
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#17327917907044420-571: The inventor's normal or specifically assigned employment duties, where an invention might reasonably be expected to result from carrying out those duties, or if the inventor had a special obligation to further the interests of the employer's company. Applications by artificial intelligence systems, such as DABUS , have been rejected in the US, the UK, and at the European Patent Office on the grounds they are not natural persons. The inventors, their successors or their assignees become
4505-588: The late Eastern Han dynasty (25–220 AD). According to Hong-Sen Yan, director of the National Science and Technology Museum , early Chinese padlocks were mainly " key -operated locks with splitting springs, and partially keyless letter combination locks ". Padlocks were made from bronze, brass, silver, and other materials. The use of bronze was more prevalent for the early Chinese padlocks. Padlocks with spring tine mechanisms have been found in York, England, at
4590-414: The legal right to exclude others from making, using, or selling an invention for a limited period of time in exchange for publishing an enabling disclosure of the invention. In most countries, patent rights fall under private law and the patent holder must sue someone infringing the patent in order to enforce their rights. The procedure for granting patents, requirements placed on the patentee, and
4675-437: The licensee the right to make, use, sell, or import the claimed invention, usually in return for a royalty or other compensation. It is common for companies engaged in complex technical fields to enter into multiple license agreements associated with the production of a single product. Moreover, it is equally common for competitors in such fields to license patents to each other under cross-licensing agreements in order to share
4760-531: The lock parts in it, was riveted together. This padlock was popular for its low cost and impact-resistant laminated plate design. Today, many lock makers copy this very efficient and successful design. A padlock is composed of a body, shackle , and locking mechanism. The typical shackle is a U-shaped loop of metal (round or square in cross-section) that encompasses what is being secured by the padlock (e.g., chain link or hasp). Generally, most padlock shackles either swing away (typical of older padlocks) or slide out of
4845-527: The middle La Tène period , subsequently spreading to the Roman world and the Przeworsk and Chernyakhov cultures . Roman padlocks had a long bent rod attached to the case, and a shorter piece which could be inserted into the case. Przeworsk and Chernyakhov padlocks had a sleeve attached to the case, and a long bent rod which could be inserted into the case and the sleeve. Padlocks have been used in China since
4930-671: The most significant aspect of the convention is the provision of the right to claim priority : filing an application in any one member state of the Paris Convention preserves the right for one year to file in any other member state, and receive the benefit of the original filing date. Another key treaty is the Patent Cooperation Treaty (PCT), administered by the World Intellectual Property Organization (WIPO) and covering more than 150 countries. The Patent Cooperation Treaty provides
5015-467: The padlock body when in the unlocked position. Less common designs include a straight, circular, or flexible (cable) shackle. Some shackles split apart and come together to lock and unlock. There are two basic types of padlock locking mechanisms: integrated and modular. Integrated locking mechanisms directly engage the padlock's shackle with the tumblers. Examples of integrated locking mechanisms are rotating disks (found in "Scandinavian" style padlocks where
5100-399: The patent application to determine if it meets the patentability requirements of that country. If the application does not comply, objections are communicated to the applicant or their patent agent or attorney through an Office action , to which the applicant may respond. The number of Office actions and responses that may occur vary from country to country, but eventually a final rejection
5185-400: The patent owner seeks monetary compensation ( damages ) for past infringement, and seeks an injunction that prohibits the defendant from engaging in future acts of infringement, or seeks either damages or injunction. To prove infringement, the patent owner must establish that the accused infringer practises all the requirements of at least one of the claims of the patent. (In many jurisdictions
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#17327917907045270-488: The patent owner the right to exploit the invention subject to the patent. For example, many inventions are improvements of prior inventions that may still be covered by someone else's patent. If an inventor obtains a patent on improvements to an existing invention which is still under patent, they can only legally use the improved invention if the patent holder of the original invention gives permission, which they may refuse. Some countries have "working provisions" that require
5355-427: The patent owner will have no legal grounds for enforcing the patent in country B as it was already sold in a different country. Patents can generally only be enforced through civil lawsuits (for example, for a US patent, by an action for patent infringement in a United States federal district court), although some countries (such as France and Austria ) have criminal penalties for wanton infringement. Typically,
5440-544: The patent owner, permissions to create a patented product based on different situations that align with public policy or public interest. These may include compulsory licenses, scientific research, and in transit in country. After two decades of drafting, the WIPO 's Intergovernmental Committee on Intellectual Property and Genetic Resources, Traditional Knowledge and Folklore moved to a Diplomatic Conference in May 2024 and adopted
5525-562: The patent should never have been granted. There are several grounds for challenges: the claimed subject matter is not patentable subject matter at all; the claimed subject matter was actually not new, or was obvious to the person skilled in the art , at the time the application was filed; or that some kind of fraud was committed during prosecution with regard to listing of inventors, representations about when discoveries were made, etc. Patents can be found to be invalid in whole or in part for any of these reasons. Patent infringement occurs when
5610-679: The permission of the other proprietor(s). The ability to assign ownership rights increases the liquidity of a patent as property. Inventors can obtain patents and then sell them to third parties. The third parties then own the patents and have the same rights to prevent others from exploiting the claimed inventions, as if they had originally made the inventions themselves. The grant and enforcement of patents are governed by national laws, and also by international treaties, where those treaties have been given effect in national laws. Patents are granted by national or regional patent offices, i.e. national or regional administrative authorities. A given patent
5695-490: The popular cast hearts and went with this new stamped shell lock body design. Many lock manufacturers made this very popular style of lock. In 1877 Yale & Towne was granted a patent for a padlock that housed a stack of levers and had a shackle that swung away when unlocked. It was a notable design because the levers were sub-assembled into a "cartridge" that could be slid into a cast brass body shell. The assembly would remain together by means of two taper pins passed through
5780-690: The procedures under the European Patent Convention (EPC) [constituting the European Patent Organisation (EPOrg)], that centralize some portion of the filing and examination procedure. Similar arrangements exist among the member states of ARIPO and OAPI , the analogous treaties among African countries, and the nine CIS member states that have formed the Eurasian Patent Organization . A key international convention relating to patents
5865-443: The proprietors of the patent when and if it is granted. If a patent is granted to more than one proprietor, the laws of the country in question and any agreement between the proprietors may affect the extent to which each proprietor can exploit the patent. For example, in some countries, each proprietor may freely license or assign their rights in the patent to another person while the law in other countries prohibits such actions without
5950-400: The reasonable requirements of the public have been met by the working of invention. In most jurisdictions, there are ways for third parties to challenge the validity of an allowed or issued patent at the national patent office; these are called opposition proceedings . It is also possible to challenge the validity of a patent in court. In either case, the challenging party tries to prove that
6035-437: The relevant area of technology) to make and use the invention. In some countries there are requirements for providing specific information such as the usefulness of the invention, the best mode of performing the invention known to the inventor, or the technical problem or problems solved by the invention. Drawings illustrating the invention may also be provided. The application also includes one or more claims that define what
6120-468: The relevant country. Although an infringer is generally free to rely on any available ground of invalidity (such as a prior publication , for example), some countries have sanctions to prevent the same validity questions being relitigated. An example is the UK Certificate of contested validity . Patent licensing agreements are contracts in which the patent owner (the licensor) agrees to grant
6205-502: The right granted to anyone who invents something new, useful and non-obvious. A patent is often referred to as a form of intellectual property right, an expression which is also used to refer to trademarks and copyrights , and which has proponents and detractors (see also Intellectual property § The term "intellectual property" ). Some other types of intellectual property rights are also called patents in some jurisdictions: industrial design rights are called design patents in
6290-443: The scope of the patent may not be limited to what is literally stated in the claims, for example due to the doctrine of equivalents .) An accused infringer has the right to challenge the validity of the patent allegedly being infringed in a counterclaim . A patent can be found invalid on grounds described in the relevant patent laws, which vary between countries. Often, the grounds are a subset of requirements for patentability in
6375-546: The shackle, allowing the shackle to slide out of the body. The McWilliams company received a patent for these locks in 1871. The "Scandinavian" design was so successful that JHW Climax & Co. of Newark, New Jersey continued to make these padlocks until the 1950s. Today, other countries are still manufacturing this style of padlock. Contemporary with the Scandinavian padlock, were the "cast heart" locks, so called because of their shape. A significantly stronger lock than
6460-400: The shell and cartridge. This design gave the commercial padlock market a serviceable, rekeyable padlock. About twenty years later Yale made another "cartridge" style padlock that employed their famous pin tumbler mechanism and a shackle that slid out of the body instead of swinging away. Although machining metal was a method that was available to lock makers since the early 19th century, it
6545-399: The smokehouse and much more resistant to corrosion than the Scandinavian, the hearts had a lock body sand cast from brass or bronze and a more secure lever mechanism. Heart locks had two prominent characteristics: one was a spring-loaded cover that pivoted over the keyhole to keep dirt and insects out of the lock that was called a "drop". The other was a point formed at the bottom of the lock so
6630-404: The tumblers or to service the lock. Modular locking mechanism cylinders frequently employ pin , wafer , and disc tumblers . Padlocks with modular mechanisms are usually automatic, or self-locking (that is, the key is not required to lock the padlock) Combination locks do not use keys. Instead, the lock opens when its wheels are lined up correctly to display the correct combination . A padlock
6715-431: The university's patenting activity plateaued in the 2010s. Incidentally, only 20% of Stanford patents in that dataset produced a positive net income for the university, while the rest was a net loss. Similar declines have been noted not only for the number of patents, but also for other measures of innovation output. Several hypotheses have been proposed as explanations for the observed decline: A patent does not give
6800-537: The use of a key to lock. The more modern modular locking mechanisms, however, do not directly employ the tumblers to lock the shackle. Instead, they have a plug within the "cylinder" that, with the correct key, turns and allows a mechanism, referred to as a "locking dog" (such as the ball bearings found in American Lock Company padlocks) to retract from notches cut into the shackle. Padlocks with modular locking mechanisms can often be taken apart to change
6885-472: Was created during the Revolution in 1791. Patents were granted without examination since inventor's right was considered as a natural one. Patent costs were very high (from 500 to 1,500 francs). Importation patents protected new devices coming from foreign countries. The patent law was revised in 1844 – patent cost was lowered and importation patents were abolished. The first Patent Act of
6970-612: Was incorporated into the Statute of Monopolies (1624) in which Parliament restricted the Crown's power explicitly so that the King could only issue letters patent to the inventors or introducers of original inventions for a fixed number of years. The Statute became the foundation for later developments in patent law in England and elsewhere. Important developments in patent law emerged during
7055-460: Was invented by John I. W. Carlson in 1931 (a patent was granted in November 1934) that has both a combination on one side and a key on the other. Electronic padlocks are categorized as either "active" or "passive" electronic padlocks. Active electronic padlocks are divided into rechargeable electronic padlocks and replaceable battery electronic padlocks. The key of this type of electronic padlock
7140-410: Was not economically feasible to do so until the very early 20th century when electrical generation and distribution became widespread. Some of the earliest padlocks (c. 1905) that were made from a machined block of cast or extruded metal resemble today's modern padlock. Corbin and Eagle were one of the first lock makers to machine a solid block of metal and insert a relatively new pin tumbler mechanism and
7225-596: Was the World's leader in terms of patent families filed between 1900 and 1966, when Japan took over. Since 2007 PR China leads. However, in most technologically advanced countries (see, for example, France, Italy, Japan, Spain, Sweden, the UK in the figure on the right, as well as in Poland ), the total (i.e. regardless of the priority/inventors' country) number of patent families filed there have been declining in absolute numbers since c. 1970s –1980s. The decline
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