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All Patents in class 137/613
Patents 1 - 6 of 6
First set of recordsLast set of records
30,485Oct. 23, 1860J.F. LetellierSteam Valvesteam engine valves
217,176Jul. 01, 1879D. Lang, A. Linn, A.J. UlschtImprovement in apparatus for regulating pressure in fermenting-casksbrewing apparatus
402,749May 07, 1889S. LawsonGas Enginegas and gasoline engines
2,384,169Sep. 04, 1945G.E. Huck, F.O. LuenbergerControlling pressure in a fluid-filled motorelectric motors
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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