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Extensible Car-Step.
Patent for an extensible car-step for trolleys that attaches to the ordinary steps of a trolley car.
Date:
February 6, 1912
Creator:
Uhl, Edgar G.
System:
The Portal to Texas History
Rotary Drill
Patent for a rotary drill.
Date:
January 6, 1903
Creator:
Seed, Leonard F.
System:
The Portal to Texas History