Patent model
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." These earliest patent law required that a working model of each invention be produced in miniature.
History of United States patent law
This first general patent act of the state of South Carolina is titled "An Act for the Encouragement of Arts and Sciences." Although most of its terms concerned the protection of copyrights, it also included the following provision: "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."