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Recording Door-Lock

Description: Patent for "a continuous-recording lock suitable for bonded warehouses, factories, stores, public buildings, offices &c., and by a slight modification applicable, also, for private residences" (lines 7-11).
Date: January 1, 1889
Creator: Ferguson, George J.
Partner: UNT Libraries Government Documents Department

Boat Propeller

Description: Patent for a boat propeller. Illustration included.
Date: January 1, 1907
Creator: Edgar, Samuel Nooley
Partner: UNT Libraries Government Documents Department
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