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Patents Granted on 1939-05-09
Patents 1 - 10 of 10
First set of recordsLast set of records
NumberDatePatenteeTitleType
2,157,191May 09, 1939J.B. SinnettMethod of and means for cooling motorsmotor cooling
2,157,417May 09, 1939R.F. KneisleyAutomatic circuit selectorwoodworking machine mechanisms
2,157,444May 09, 1939C.P. WhitlockTool Holder for Pneumatic Hammerstool holders
2,157,480May 09, 1939L.A. ColeMagnetic valvepump valves
2,157,758May 09, 1939R.S. JacobsenChange Speed Transmission
2,157,760May 09, 1939W.E. KaneStraightening machinemetal bending machines
2,157,762May 09, 1939W.R. KnoxMachine tooldrilling and boring
2,157,946May 09, 1939R.D. WortendykeInfeed Cycle Control Mechanism for Grinding Machinesgrinding machines
2,157,948May 09, 1939H.H. BeenyHardening of Metal Surfacesflame hardening machines
2,158,024May 09, 1939A.L. StowellCoilable measuring ruletape measures
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