Railway signal patented

Date: 
Tue, 1888-01-10

On this date in 1888, A.B. Blackburn patented the railway signal. patent number # 376,362.

Reference:
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
ISBN 0-688-11536-5

Global Black Inventors