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Patents for George O. Leopold
Patents 1 - 15 of 77
First set of recordsNext set of recordsLast set of records
864,633Aug. 27, 1907G.O. Leopold, T.J. FegleyScrew holder for drivers
894,673Jul. 28, 1908G.O. LeopoldRatchet mechanismratcheting screwdrivers
906,902Dec. 15, 1908G.O. LeopoldSpeed-change geareggbeater drills
908,872Jan. 05, 1909G.O. LeopoldBall bearing
917,319Apr. 06, 1909G.O. LeopoldBreast-drillbreast drills
939,042Nov. 02, 1909G.O. LeopoldGearingeggbeater drills
968,372Aug. 23, 1910G.O. LeopoldBall-bearingtool making machines
977,957Dec. 06, 1910G.O. LeopoldRatchet Mechanism for Screw-Drivers, &c.ratcheting screwdrivers
979,939Dec. 27, 1910G.O. Leopold, T.J. FegleySpiral tool-driverhand drills
982,510Jan. 24, 1911G.O. LeopoldRatchet mechanismeggbeater drills
1,008,164Nov. 07, 1911G.O. LeopoldRatchet Screw-Driverratcheting screwdrivers
1,015,235Jan. 16, 1912G.O. LeopoldGearingeggbeater drills
1,021,538Mar. 26, 1912G.O. LeopoldGearingeggbeater drills
1,023,023Apr. 09, 1912G.O. LeopoldGearinghand drills
1,033,712Jul. 23, 1912G.O. LeopoldChain Drilldrill accessories
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