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Wrench.
Patent for a wrench which "may be efficiently employed in places which are inaccessible to the ordinary wrench."
Date:
August 24, 1915
Creator:
Culbertson, Charles P.
System:
The Portal to Texas History
Plow.
Patent for an improvement to the plow by providing a plastic or plastic-like material to help sticky, thick soil and clay to glide over the surface and decrease frictional resistance, including illustrations.
Date:
March 2, 1915
Creator:
Fleehearty, Edward L.
System:
The Portal to Texas History