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All Patents in class 137/596
Patents 1 - 7 of 7
First set of recordsLast set of records
NumberDatePatenteeTitleType
RE921Mar. 06, 1860A. CrosbyImproved valve for steam-enginessteam engine valves
257,871May 16, 1882J. Humphreys, Jr.Pumprotary pumps
486,099Nov. 15, 1892H.F. FrisbieValve for Steam Enginessteam engine valves
666,156Jan. 15, 1901E.B. RidgwaySteam hydraulic elevatorelevators and lifts
808,014Dec. 19, 1905E.T. CopeSteam Engine Valvesteam engine valves
1,537,437May 12, 1925G. GraffinbergerTrimmer-saw mechanismcircular sawmills
3,696,834Oct. 10, 1972W. Vonhoff, Jr.Fluid control device
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