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System of Subirrigation.
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.
System:
The Portal to Texas History
Spring-Wheel.
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
System:
The Portal to Texas History