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System of Subirrigation.

Description: Patent for the improvement of a subirrigation system, which allows the prevention of the pipes being choked by pipes through the use of coiled pipes.
Date: January 23, 1912
Creator: Robinson, William M.
Partner: UNT Libraries Government Documents Department

Spring-Wheel.

Description: Patent for a steel wheel with springs for automobiles that reduces jarring, is affordable, and does not get damaged as easily as the pneumatic tires previously in use on automobiles.
Date: April 23, 1907
Creator: Tubbs, William Oscar
Partner: UNT Libraries Government Documents Department
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