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Burglar Alarm
Patent for alarm that is activated upon the closing of a circuit, which will occur when an intruding person enters through the window or door.
Date:
February 27, 1917
Creator:
Hilley, Albert O.
System:
The Portal to Texas History
Cotton Chopper
Patent for chopper blade for cotton.
Date:
February 6, 1917
Creator:
Jones, Martin A.
System:
The Portal to Texas History