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Patents Granted on 1939-12-12
Patents 1 - 8 of 8
First set of recordsLast set of records
NumberDatePatenteeTitleType
2,182,922Dec. 12, 1939E.A. HeschelMethod of Producing a Socket Wrench Headwrench sockets
2,183,207Dec. 12, 1939D.D. WileValve Structurevalves
2,183,258Dec. 12, 1939J.R. HarmanPower operated routerrouting machines
2,183,297Dec. 12, 1939G.K. McKee, C.E. BernittMachine tooldrill presses
2,183,362Dec. 12, 1939G. Davenport, W.F. ZimmermannRoller Bearing Mounted Work Tablegear making machines
2,183,363Dec. 12, 1939W.F. ZimmermannWork Tablegear hobbing machines
2,183,488Dec. 12, 1939G.B. DuffieldClosureheating apparatus
2,183,514Dec. 12, 1939A.G. Ericson, B.R. GranbergGearingmetalworking machine gearing
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