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.
Mary Kenner
She invented the sanitary belt with moisture-proof napkin pocket. The sanitary napkin wasn't used until 1956, thirty years after she had first invented it. The company that first showed interest in her invention rejected it after they discovered that she was an African American woman. Between 1956 and 1987 she received five patents for her household and personal item creations. She invented a bathroom tissue holder which she patented with patent number , on October 19, 1982. and a back washer mounted on the shower or bathtub wall, which she patented in 1987. She also patented the carrier attachment for an invalid walker in 1959.