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Rotary Drill

Description: Patent for a rotary drill.
Date: January 6, 1903
Creator: Seed, Leonard F.
Partner: UNT Libraries Government Documents Department

Extensible Car-Step.

Description: 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.
Partner: UNT Libraries Government Documents Department
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