Informational and historical African American History in reference to Richard Bowie Spikes patents that we still use today. Inventor of: Beer Tapper, Billiard Cue Rack, Take-up Device, Trolley Pole Arrester, Brake Testing Machine, Pantograph, Combination Milk Bottle Opener and Cover, Method and Apparatus for Obtaining Average Samples, Automatic Gear Shift, Transmission and Shifting Means Therefor, Horizontally Swinging Barber's Chair, Automatic Safety Brake System.

свернуть