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Safe Lock

Description: Patent for providing "a means which will necessitate the operation of a series of setting devices before the several bolts can be moved to unlock the door". (lines 11-14).
Date: June 13, 1918
Creator: Harris, William J. B. of Bonham, TX
Partner: UNT Libraries Government Documents Department

Hinged Connection

Description: Patent for a simply designed, durable, and inexpensively produced hinged connection between any swinging item (i.e., door) and non-swinging item (i.e., door jam).
Date: April 13, 1915
Creator: Coleman, Paul H.
Partner: UNT Libraries Government Documents Department
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