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All Patents in class 137/625.68
Patents 1 - 12 of 12
First set of recordsLast set of records
NumberDatePatenteeTitleType
78,933Jun. 16, 1868D. DavySteam Balanced Valvedrop hammers
215,293May 13, 1879D.C. PrescottImprovement in balanced valves for steam-enginessteam engine valves
332,632Dec. 15, 1885P. AmingtonPiston Valvesteam engine valve gear
368,422Aug. 16, 1887C.T. PorterValve for steam-enginessteam engine valves
669,284Mar. 05, 1901G.M. PeltonReciprocating Valvesteam valves
808,014Dec. 19, 1905E.T. CopeSteam Engine Valvesteam engine valves
992,349May 16, 1911W.F. GouldBalanced Slide-Valvesteam engine valves
1,819,703Aug. 18, 1931W. ErnstValve hydraulic motor controls
2,365,748Dec. 26, 1944F.W. CurtisHydraulic Circuitmilling machines
2,630,135Mar. 03, 1953C. JohnsonFluid valve for duplicating systemmilling machine accessories
3,084,899Apr. 09, 1963C.L. Gschwind, L.A. DeverManual Three Direction Tracerhydraulic apparatus
3,163,180Dec. 29, 1964J.C. CampbellPlunger Construction for Fluid Flow Control Valvehydraulic apparatus
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