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Patents Granted on 1939-10-31
Patents 1 - 6 of 6
First set of recordsLast set of records
NumberDatePatenteeTitleType
2,177,820Oct. 31, 1939H.F. BrownBoring Chuckboring heads
2,177,852Oct. 31, 1939D.D. WileRefrigerating Apparatusrefrigeration apparatus
2,177,979Oct. 31, 1939E.E. DavisChuckdrill press chucks
2,178,135Oct. 31, 1939S.G. BradyTrimming Mechanism for Grinding Wheelsgrinder dressers
2,178,205Oct. 31, 1939G.O. JohnsonPunch press control
2,178,441Oct. 31, 1939F.R. SwansonMilling machine
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