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All Patents in class 91/31
Patents 1 - 7 of 7
First set of recordsLast set of records
NumberDatePatenteeTitleType
1,036,842Aug. 27, 1912C.L. HeislerValve Reversing Gearsteam engine valve gear
1,722,506Jul. 30, 1929H.G. SahlinDrop hammerdrop hammers
1,924,545Aug. 29, 1933W.H. Fitzgerald, R.P. FitzgeraldDrop hammerdrop hammers
1,976,122Oct. 09, 1934F.S. HaasHydraulic Drive for Grinding Machinesgrinding machines
2,525,127Oct. 10, 1950W.F. Groene, H.J. Siekmann, W.R. MeyerHydraulic feed and control mechanismcrankshaft lathes
2,612,184Sep. 30, 1952W.I. EvansSensitive Hydraulic Tracer Valvehydraulic apparatus
3,016,804Jan. 16, 1962J.G. Osburn, F. ZanklProgram Control Systemmilling machines
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