UNT Libraries Government Documents Department - 2 Matching Results
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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.
- Improvement in Sulky Plows
- Patent for the improvement of sully plows by regulating the depth of furrow.