Invention: Cotton Planter
Henry Blair was the only inventor to be identified in the Patent Office records as "a colored man." Blair was born in Montgomery County, Maryland around 1807. He received a patent on October 14, 1834 for a seed planter and a patent in 1836 for a cotton planter.
Henry Blair was the second black inventor to receive a patent the first was Thomas Jennings who received a patent in 1821 for a dry cleaning process.
Henry Blair signed his patents with an "x" because he could not write. Henry Blair died in 1860. What we know about early black inventors comes mostly from the work of Henry Baker. He was an assistant patent ... inventors.about.com