innovations on this date -- October 21st
Posted by Douglas Sorocco, October 21, 2004 at 12:36 pm
October 21st -- A banner day for new inventions: On this date in 1879 Thomas Edison invented the electric light bulb; the first transatlantic message by radio telephone was sent, from Arlington, VA, to Paris, France in 1915; in 1925, the photoelectric cell was first demonstrated by the Westinghouse Co.
Other October 21st events.
From "Today in Science History" -- a great website when looking for odd science trivia.