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Antifreezing Outlet-Valve for Tanks.
Patent for a new and improved "valve-operating mechanism which cannot be rendered inoperative by ice forming in the tank, and also whereby the valve itself cannot become frozen" (lines 26-30) including illustrations.
Date:
May 5, 1914
Creator:
Whipp, John W.
System:
The Portal to Texas History
Improvement in Sulky Plows
Patent for the improvement of sully plows by regulating the depth of furrow.
Date:
April 5, 1870
Creator:
Boyd, John G. & Bailey, Allen
System:
The Portal to Texas History