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in subjects: "locks"  
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Sash Lock

Description: Patent for an improvement for window sash locks, with an improved ability to hold windows in place.
Date: January 10, 1922
Creator: Brown, John A.
Partner: UNT Libraries Government Documents Department

Lock-Protecting Device.

Description: Patent for combination lock for safes or vaults with added mechanism for dispensing a gas to deter robberies.
Date: April 25, 1922
Creator: Bumpass, Leonard E.
Partner: UNT Libraries Government Documents Department
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