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All Patents of Type: spiral drills
Patents 1 - 6 of 6
First set of recordsLast set of records
NumberDatePatenteeTitleType
24,005May 17, 1859M.S. BrooksDrill-stockspiral drills
54,069Apr. 17, 1866D.F. HartfordImprovement in drill-stocksspiral drills
143,084Sep. 23, 1873J.K. LaudermilchImprovement in jeweler's drilling devicesspiral drills
463,507Nov. 17, 1891H.E. Goodell, A.D. GoodellPush Drillpush drills
529,401Nov. 20, 1894H. Pratt, W.H. McCoySpiral screw driver and drillspiral screwdrivers
1,022,311Apr. 02, 1912T.J. FegleySpiral Screw-Driver and Drillspiral screwdrivers
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