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Valve Structure for Oil-Wells.

Description: Patent for Valve Oil-Wells. This improved Valve Oil Well will increase efficiency and durability of device.
Date: September 19, 1919
Creator: McEvoy, John Philip
Partner: UNT Libraries Government Documents Department

Mechanical Toy Hoop

Description: Patent for improved features for mechanical toy hoops, particularly for toys utilizing trundling hoops.
Date: September 5, 1916
Creator: Giesecke, Leo
Partner: UNT Libraries Government Documents Department

Stand-Value for Oil-Well Pumps.

Description: Patent for a Stand-Value for Oil-Well Pumps so that the ball seat in an oil well pump does not work loose. This is also meant to be turned end for end so that the part's life is lengthened. With this being done, the utility of the oil-pump should now be enhanced.
Date: September 24, 1918
Creator: Slaughter, George W., Jr.
Partner: UNT Libraries Government Documents Department

Nut-Lock

Description: Patent for a nut lock. Illustrations included.
Date: September 6, 1910
Creator: Lance, Andrew M.
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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