The New York Stock Exchange is not open on weekends. Stock Exchanges in America, Europe, and Asia follow the typical Monday to Friday schedule. However, in the Middle East the work week typically runs from Sunday through Thursday.
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.
In 1831, Thomas Jennings became assistant secretary for the First Annual Convention of the People of Color in Philadelphia, PA. Thomas L. Jennings Dry Scouring technique created modern day dry cleaning. His patent made him a fortune for the time. Jennings was fortunate that he was a free man, and not a slave at the time of his invention.