A patent is a type of intellectual property that gives its owner 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. It offers a bargain between society and inventor: for a limited period of exclusivity, the inventor agrees to make the invention public rather than to keep it secret. 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 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 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.
Definition
The word patent originates from the Latin patere, which means "to lay open" (i.e., to make available for public inspection). It 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 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 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.
History
Although there 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.
The first modern patents, however, didn’t come about until the Medieval period. The first recorded industrial patent was granted in 1421 to Filippo Brunelleschi, a Florentine engineer and architect who invented a new way to transport marble from quarries on the river Arno via barge. The Venetian Senate granted Brunelleschi an exclusive privilege valid for three years: during this period, no one else could build, use, or copy the invention without his consent. Otherwise, the authorities would confiscate the vessel and impose penalties.
This type of protection—based on a temporary privilege—marked a significant legal innovation: for the first time, technical innovation was protected through an exclusive subjective right recognized by the state. In 1449, the first English patent was granted to Flemish glassmaker John of Utynam for a twenty-year monopoly on making stained glass. Venice, too, was granting patent protections by this time, usually for glassmaking.
Patents were systematically granted in Venice as of 1474, where they issued a decree, the Venetian Patent Statuto, by which new and inventive devices had to be communicated to the Republic 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 patent system evolved from its late medieval origins into the first modern patent system that recognised intellectual property 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 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 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 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 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 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 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.
Gender gap in patents
The first patent in England known to be granted to a woman was to Mrs. Amye Everard Ball in 1637 for a tincture of saffron.
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 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 the gender gap in patents is also a result of internal bias within the patent system.
Innovation decline
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 was the World's leader in terms of patent families filed between 1900 and 1966, when Japan took over. Since 2007 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 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 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:
increasing cost of doing research, as "lower-hanging fruits have been picked up";
decrease in productivity per researcher; This occurred because factor (1) (higher hanging fruits) overwhelms increased efficiency in computation, automation, big data analysis and communication.
human civilization is reaching the limits of the human brain rather than technological limits. "For the first time in history people are bombarded with far more information than they can process."
It has also been suggested that the rate of innovation is proportional to the rate of population growth (rather than to the total population), and that the observed decline in research productivity is related to the resource-limited Malthusian growth model.
increasing fragmentation of patent encumbrance and increasing number and cost of patent litigations;
decreasing value of patents in post-industrial economies, as businesses prefer less risky and more profitable investments in software rather than in hardware, which can be protected more effectively and at a lower cost by using copyrights, trade secrets, first mover advantage, download limitations (see digital economy). A related decline of manufacturing share in the GDP of post-industrial countries has been reported in some studies.
a slow-down in patent applications in the US has been attributed to court decisions in Mayo Collaborative Services v. Prometheus Laboratories, Inc.(2012), Association for Molecular Pathology v. Myriad Genetics, Inc. (2013) and Alice Corp. v. CLS Bank International (2014) limiting the eligibility of business method and biological patents. Similar restrictions on software patents have been enacted in other countries.
the number of patent applications from China is expected to go down after 2025, when government subsidies for patent filing are to expire.
patents that are registered but not commercialized, as is the case in around 50% of them, function as a barrier to the registration of similar ideas, effectively creating a growing zone of non-patentability.
Law
Effects
A patent does not give a right to make or use or sell an invention. Rather, a patent provides, from a legal standpoint, the right to exclude others from unlawful 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 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 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 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 the reasonable requirements of the public have been met by the working of invention.
Challenges
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 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.
Infringement
Patent infringement occurs when 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 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 trivial 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 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 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 the patent owner will have no legal grounds for enforcing the patent in country B as it was already sold in a different country.
Enforcement
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, the patent owner seeks monetary compensation (damages) for past infringement, and seeks an injunction that prohibits the defendant from engaging in future acts of intellectual property 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 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 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 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 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.
Ownership
In most countries, both natural persons and corporate entities may apply for 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 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 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 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.
Governing laws
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 is therefore only useful for protecting an invention in the country in which that patent is granted by the rule of law. 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 for further open research (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 the applicant) who might seek patent protection for the invention in those countries, although this is protected under relevant international laws and treaty.
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 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 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 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 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 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 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