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Obtaining patents became much easier during the period after the Patent Act of 1793 and the next federal Patent Act passed in 1836. Between the Patent Act of 1790 and that of 1793, only 57 patents were granted, but by July 2, 1836, a total of 10,000 patents had been granted. [17] This however, came at an expense of the quality of patents granted.
The 100 known most prolific inventors based on worldwide utility patents are shown in the following table. While in many cases this is the number of utility patents granted by the United States Patent and Trademark Office, it may include utility patents granted by other countries, as noted by the source references for an inventor.
The first patent denoted with the serial numbering system still in use today was issued on July 13, 1836, and was given the number 1. [3] A number of X-Patents were recovered in 2004 from the Dartmouth College archives. [4] Of the 14 found, 10 were granted to Samuel Morey including the first known patent for an internal combustion engine.
Patents were granted without examination since inventor's right was considered as a natural one. Patent costs were very high (from 500 to 1500 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 Patent Act of 1836 (Ch. 357, 5 Stat. 117) further clarified United States patent law to the extent of establishing a patent office where patent applications are filed, processed, and granted, contingent upon the language and scope of the claimant's invention, for a patent term of 14 years with an extension of up to an additional seven years.
The original patent term under the 1790 Patent Act was decided individually for each patent, but "not exceeding fourteen years". The 1836 Patent Act (5 Stat. 117, 119, 5) provided (in addition to the fourteen-year term) an extension "for the term of seven years from and after the expiration of the first term" in certain circumstances, when the inventor hasn't got "a reasonable remuneration for ...
Thomas L. Jennings (c. 1791 – February 12, 1859) was an African-American inventor, tradesman, entrepreneur, and abolitionist in New York City, New York.He has the distinction of being the first African-American patent-holder in history; he was granted the patent in 1821 for his novel method of dry cleaning. [1]
The X distinguishes the patents from those issued after the fire, which began again with patent number 1. Each year, the PTO issues over 150,000 patents to companies and individuals worldwide. As of December 2011 [update] , the PTO had granted 8,743,423 patents and received 16,020,302 applications.