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.
Puckle gun
The Puckle gun (also known as the "Defence gun") was a primitive crew-served, manually-operated flintlock revolver patented in 1718 by James Puckle (1667–1724) a British inventor, lawyer and writer. It was one of the earliest weapons to be referred to as a "machine gun", being called such in a 1722 shipping manifest, though its operation does not match the modern use of the term. However, the Puckle gun was never used during any combat operation or war. Production was highly limited and may have been as few as two guns.