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Antifreezing Outlet-Valve for Tanks.

Description: 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.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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