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Automatic Electric Advertising Sign
Patent for an electronic sign that works by a conveyor-belt like band printed with advertisements being rotated, allowing the owner to show many advertisements while saving space.
Date:
July 1, 1919
Creator:
Craig, Richard M.
System:
The Portal to Texas History
Fuel Heater For Internal Combustion Engines
Patent for a fuel heating system designed to be incorporated into combustion engines.
Date:
April 1, 1919
Creator:
Vaughan, E. A.
System:
The Portal to Texas History