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Thomas L. Jennings (1791 â February 12, 1856) was an African-American tradesman and abolitionist in New York City, New York. He operated and owned a tailoring and dry-cleaning business, and, on March 3,1821, he was granted patent 3306x for a dry scrub process as the first African American to be granted a patent.
Thomas Jennings, a free-born New Yorker who became a leader of the abolitionist movement, made his fortune as the inventor of a dry-cleaning process called âdry scouring.â Born in 1791, Jennings was 30 years old when he received his patent on March 3, 1821 (U.S. patent 3306x), becoming the first African-American inventor to own the rights to his ...