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.
History of patent law
In England, grants in the form of letters patent were issued by the sovereign to inventors who petitioned and were approved: a grant of 1331 to John Kempe and his Company is the earliest authenticated instance of a royal grant made with the avowed purpose of instructing the English in a new industry. These letters patent provided the recipient with a monopoly to produce particular goods or provide particular services. Another early example of such letters patent was a grant by Henry VI in 1449 to John of Utynam, a Flemish man, for a twenty-year monopoly for his invention.