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All Patents in class 137/625.31
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
443,107Dec. 23, 1890F.C. OlinBalanced Govenor Valve
519,639May 08, 1894E.S. MatthewsHydraulic valve
2,912,011Nov. 10, 1959F.G. BurgValve structuredrill presses
3,067,768Dec. 11, 1962J.L. BurgTemperature compensated hydraulic control devicedrill presses
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