- Search The Registry
- Teacher’s Forum
- Youth Programs
- About Us
- Creating Support
- My Account
On this date in 1888, A.B. Blackburn patented the railway signal. patent number # 376,362.
Created Equal: The Lives and Ideas of Black American Innovators
By James Michael Brodie
Copyright 1993, by Bill Adler Books, Inc.
William Morrow and Co. Inc., New York