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All Patents of Type: countersinks
Patents 1 - 15 of 74
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NumberDatePatenteeTitleType
9,705May 10, 1853A.G. BachelderCountersinkcountersinks
41,894Mar. 08, 1864H.S. ShepardsonImprovement in Countersinkscountersinks
50,328Oct. 10, 1865W.G. BonwillImprovement in Screw-Driversscrewdriver blades
52,174Jan. 23, 1866A. Parsons, C.F. KimballImprovement in Bits for Boring Holescountersinks
55,144May 29, 1866H.T. MoodyCountersink for Boltscountersinks
60,207Dec. 04, 1866H.C. LewisImproved Countersink Bitcountersinks
62,849Mar. 12, 1867T. HofstatterImprovement in Augerscountersinks
63,392Apr. 02, 1867M. JincksImprovement in Boring Bitscountersinks
74,490Feb. 18, 1868J.A. BidwellScrewdriver and Countersinkscrewdriver blades
77,819May 12, 1868C. KrebsImprovement in countersinkscountersinks
83,348Oct. 20, 1868P.A. WhitneyImprovement in counter-sinkcountersinks
86,674Feb. 09, 1869L.H. HuntImprovement in Countersinkcountersinks
89,097Apr. 20, 1869C. WardwellImprovement in Augersauger bits
92,261Jul. 06, 1869R.P. ButtlesImprovement in Countersinkcountersinks
93,807Aug. 17, 1869W.A. ClarkImprovement in Countersink and Bitcountersinks
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