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Lock and Key.

Description: Patent for a lock which requires a key that is adjustable and difficult to duplicate in order to prevent lock picking.
Date: June 28, 1921
Creator: Dove, Bascom A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Spring Wheel.

Description: Patent for new and useful improvements in spring wheels sufficient to enable it to successfully stand up under the shocks and jars to which such wheels are ordinarily subjected, while at the same time having all the wearing qualities and resiliency of the pneumatic tire.
Date: May 20, 1920
Creator: Atkinson, George C.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Wrench.

Description: Patent for a wrench that has a fixed jaw and an adjustable slidable jaw.
Date: November 30, 1920
Creator: Fowles, Alfred T.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Nut and Pipe Wrench.

Description: Patent for a nut and pipe wrench that has a detachable handle member which allows the shank to be reduced and extended.
Date: November 23, 1920
Creator: Hunter, Arthur G.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Self-Locking, Nut.

Description: Patent for a "simple and efficient device" for "securely holding a nut upon a bolt" (lines 76-77).
Date: March 6, 1906
Creator: Galliher, Lawrence M.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Safety-Casing Clamp

Description: Patent for a tool that supports the drilling and operating of oil and gas wells. Specifically, the patented tool allows a strong method of sealing the smaller casing inside the larger casing, as the larger casing is pulled out of the well. Includes illustrations.
Date: March 15, 1921
Creator: Angus, William M.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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