X-Patent
On July 31, 1790 inventor Samuel Hopkins of Pittsford, Vermont became the first person to be issued a patent in the United States. His patented invention was an improvement in the "making of Pot Ash by a new apparatus & process." The earliest patent law required that a working model of each invention be produced in miniature.
Business method patent
Patents have been granted in the United States on methods for doing business since the US patent system was established in 1790. The first financial patent was granted on March 19, 1799, to Jacob Perkins of Massachusetts for an invention for "Detecting Counterfeit Notes." All details of Mr. Perkins' invention, which presumably was a device or process in the printing art, were lost in the great Patent Office fire of 1836. Its existence is only known from other sources.
The first financial patent for which any detailed written description survives was to a printing method entitled "A Mode of Preventing Counterfeiting" granted to John Kneass on April 28, 1815. The first fifty years of the U.S. Patent Office saw the granting of forty-one financial patents in the arts of bank notes (2 patents), bills of credit (1), bills of exchange (1), check blanks (4); detecting and preventing counterfeiting (10), coin counting (1), interest calculation tables (5), and lotteries (17).