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Lifting Jack

Description: Patent for lifting jack used to lift vehicles.
Date: January 18, 1916
Creator: Applewhite, Scott C.
Partner: UNT Libraries Government Documents Department

Back-Pressure Valve

Description: Patent for a back pressure valve for well drilling which may be "removed from the well with facility and despatch" (lines 18-20).
Date: January 18, 1910
Creator: Neighbors, Charles C.
Partner: UNT Libraries Government Documents Department

Check - Spring.

Description: Patent for a new and improved check-spring. This design "relates to check reins; and its object is to provide a new and improved check-spring for preventing sudden jars to a horse's mouth when the animal throws his head forward" (line 7 - 11).
Date: January 18, 1898
Creator: Walker, Fred B. & Reid, George W.
Partner: UNT Libraries Government Documents Department
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