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in subjects: "Locks and keys"  
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Universal Lock and Latch.

Description: Patent for an improved lock and latch system that can be utilized on either the left or right side of a door. The improved design is constructed using the minimum number of materials while remaining durable.
Date: September 14, 1920
Creator: Schultze, August J.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Detachable Inside Door-Lock.

Description: Patent for a detachable inside door-lock. This is a simple locking device that can be applied and removed from any type of door. The purpose is to make a room private and burglar proof.
Date: September 6, 1921
Creator: Arledge, Elbert H.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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