
The history of patent law in the United States is a long and complex one, dating back to before the US Constitution was even adopted. The first patent recorded in the US was granted to Samuel Hopkins on July 31, 1790, for a method of producing potash (potassium carbonate). The Patent Act of 1790, titled An Act to promote the Progress of Useful Arts, was the first federal patent statute in the country. However, the concept of patents and monopolies in the US originated with British thoughts on the advantages of society. The US Patent Law today adopts both French and British streams of thought, focusing on the inventor and their property while also emphasising the advantages to society. The US abandoned its first to invent/document system in 2013, switching to a first-to-file patent priority requirement.
| Characteristics | Values |
|---|---|
| First patent in the US | Granted to Samuel Hopkins on July 31, 1790, for a method of producing potash (potassium carbonate) |
| First Patent Act | Passed on April 10, 1790, titled "An Act to promote the Progress of Useful Arts" |
| First federal patent statute | Passed in 1790 |
| First state to pass a general patent law | South Carolina, in 1784 |
| First purpose-built Patent Office | Opened in 1840 |
| First US design patent | Granted to George Bruce in 1842 for a new typeface or font |
| First inventor to be granted Utility Patent no. 10 million | Joseph Marron in 2018 |
| First country to use the first-to-invent system | The US, until March 16, 2013 |
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What You'll Learn

The US Constitution and patent law
The US Constitution, first adopted on September 17, 1787, includes provisions for protecting intellectual property. This is found in Article I, Section 8, also known as the Patent and Copyright Clause, which states:
> "The Congress shall have Power ... To promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries."
This clause, also referred to as the Intellectual Property Clause, gives Congress the power to grant exclusive rights over inventions and creative works for a limited time, after which the public may access and use them freely. This clause was proposed by James Madison and Charles Cotesworth Pinckney, and it became the foundation for US patent law.
The first federal patent statute in the US, titled "An Act to promote the Progress of Useful Arts," was passed on April 10, 1790, and the first patent was granted on July 31, 1790, to Samuel Hopkins for a method of producing potash (potassium carbonate). This act established a standardised national patent law, replacing the previous case-specific state-level acts, which had been expensive and time-consuming for inventors seeking patents in multiple states.
The Patent Act of 1793 barred foreign inventors from receiving patents while granting them to Americans, even in cases where the technology had been pirated from other countries. This was followed by the Patent Act of 1836, which introduced a new patent numbering system and established an official Patent Office. Over time, the US patent law system has continued to evolve, with the US government granting millions of patents since 1790.
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State-specific patent laws
The history of patent law in the United States began even before the US Constitution was adopted, with some state-specific patent laws. The history of patent law in the US spans over three centuries. The earliest form of a patent was seen in medieval times when rulers granted exclusive rights or monopolies to inventors. In 1474, in Venice, the first known patent law was passed, granting inventors exclusive rights to their inventions.
In the Thirteen Colonies, inventors could obtain patents by petitioning their colony's legislature. The first patent in North America was granted by the Massachusetts General Court in 1641 to Samuel Winslow for a new process for making potash salt. This was the first instance of a colonial government granting exclusive commercial rights to a product.
In 1784, South Carolina became the first state to pass a general patent law, titled "An Act for the Encouragement of Arts and Sciences." This act set up standardised procedures for patent applications, an examination process, and general terms for patent holdings. Most of its terms concerned copyright protection, but it also included a provision for inventors:
> "The Inventors of useful machines shall have a like exclusive privilege of making or vending their machines for the like term of 14 years, under the same privileges and restrictions hereby granted to, and imposed on, the authors of books."
The US Constitution, first adopted on September 17, 1787, included a provision for protecting intellectual property rights. This provision, known as the Patent and Copyright Clause, was proposed by James Madison and Charles Cotesworth Pinckney. Madison wrote:
> "The utility of the clause will scarcely be questioned. The copyright of authors has been solemnly adjudged, in Great Britain, to be a right of common law. The right to useful inventions seems with equal reason to belong to the inventors. The public good fully coincides in both cases with the claims of the individuals."
The first federal patent statute, the Patent Act of 1790, was passed by Congress on April 10, 1790. This act was titled "An Act to promote the progress of useful Arts" and included only seven sections. The first patent was granted on July 31, 1790, to Samuel Hopkins for a method of producing potash (potassium carbonate).
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The Patent Act of 1793
Under the new act, the United States barred foreign inventors from receiving patents while granting patents to Americans who had pirated technology from other countries. This policy led to America becoming a "legal sanctuary for industrial pirates", as any American could commercialise foreign innovations with total legal immunity.
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The Patent Act of 1836
The act created an official Patent Office, freeing the Secretary of State from the duty of granting patents. It also introduced a new patent numbering system and required the examination of patent applications prior to granting them, establishing a corps of professional patent examiners. This was the second time in the world that patents were examined before being granted, the previous occasion being in the US from 1790 to 1793. The Patent Act of 1836 also allowed for the extension of existing patents, providing an additional seven years of protection on top of the original 14-year term, making the maximum term 21 years. This was abolished in 1861 and replaced with a single 17-year term.
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The switch to a first-to-file system
The United States abandoned its "first to invent/document" system on March 16, 2013, and adopted the "first-to-file" patent priority requirement. This change was brought about by the America Invents Act, signed by Barack Obama on September 16, 2011. The Act was later passed into law on March 16, 2013, and the US joined the rest of the world in operating under the "first-to-file" system.
Under the first-to-invent system, when two people claimed the same invention, the USPTO would conduct an interference proceeding to review evidence of conception, reduction to practice, and diligence. This process was often expensive and time-consuming. The first-to-file system, on the other hand, grants the right to a patent for a given invention to the first person to file a patent application for that invention, regardless of the date of the actual invention.
However, the first-to-file system is much simpler and easier to administer than the first-to-invent system. It also aligns the US patent system with international systems, benefiting the many US companies that conduct business around the world.
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Frequently asked questions
The first federal patent statute in the US was the Patent Act of 1790, titled "An Act to promote the Progress of Useful Arts".
The first US patent was granted to Samuel Hopkins on July 31, 1790, for a process of making potash, a fertiliser ingredient.
The first US design patent was granted to printer and industrialist George Bruce in 1842 for a new typeface or font.
The US abandoned its "first to invent/document" system on March 16, 2013, and moved to a "first-to-file" system.

































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