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Safety-Lock For Doors and the Like.
Patent for improvements in door safety locks. Adding this simple and easy to manufacture lock allows a door to be locked from the inside, making the door inaccessible to anyone on the outside.
Date:
June 21, 1921
Creator:
Kless, Herman L.
System:
The Portal to Texas History
Bridge Construction.
Patent for '' bridge improvements, especially for placement over gutters, ditches, and alike ''
Date:
May 14, 1920
Creator:
McKenzie, Philip A.
System:
The Portal to Texas History