Locking and Operating System for Jail-Doors.
Description:
Patent for a new way to operate and lock jail doors "whereby each and every door in the system can be locked, unlocked and operated altogether, or any one, two or more doors can be locked, unlocked and operated without disturbing the other doors of the system" (lines 11-16), including illustrations.
Date:
June 11, 1918
Creator:
Youngblood, David Franklin
Item Type:
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Patent
Partner:
UNT Libraries Government Documents Department