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Safety-Pin.

Description: Patent for an improved fastening device which incorporates a sliding shield.
Date: August 25, 1914
Creator: Pyron, John M.
Partner: UNT Libraries Government Documents Department

Hoisting Device

Description: Patent for a hoisting device. Illustration included.
Date: October 25, 1910
Creator: Sims, James L.
Partner: UNT Libraries Government Documents Department
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