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Nut-Lock

Description: Patent for a nut lock. Illustrations included.
Date: May 21, 1912
Creator: Lance, Andrew M.
Partner: UNT Libraries Government Documents Department

Pump-Jack

Description: Patent for a pump jack for operating the oil well pump rods.
Date: April 23, 1912
Creator: Seybert, Guy W.
Partner: UNT Libraries Government Documents Department

Fire and Burglar Alarm.

Description: Patent for a fire and burglar alarm for use in buildings.
Date: February 13, 1912
Creator: Gregory, Marshall J.
Partner: UNT Libraries Government Documents Department

Spring-Wheel

Description: Patent for a wheel supported by spring spokes. Illustrations included.
Date: September 24, 1912
Creator: Hudson, Alexander S.
Partner: UNT Libraries Government Documents Department
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