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Permutation-Lock.

Description: Patent for "new and useful improvements in permutation-locks." (Lines 6-7) This lock is specifically designed to protect delivered milk bottles from theft.
Date: November 13, 1917
Creator: Kirkpatrick, Otey R.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Cut-Off Lock

Description: Patent for gasoline cutoff for motor vehicles. Allows for vehicle to be still in use or running when left unattended, but will prevent it from being stolen.
Date: January 9, 1917
Creator: Reid, William O.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Casing Spear

Description: Patent for a casing spear, "to remove casing within a well or removing a tool which may be dropped within the casing," with accompanying illustrations of the patent.
Date: October 23, 1917
Creator: Wagner, Warren
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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