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All Patents in class 408/191
Patents 1 - 15 of 18
First set of recordsNext set of recordsLast set of records
9,705May 10, 1853A.G. BachelderCountersinkcountersinks
19,829Apr. 06, 1858J. Quigley, N. ClareReamer/Plug Cutter Attachmentdrill accessories
41,894Mar. 08, 1864H.S. ShepardsonImprovement in Countersinkscountersinks
43,673Aug. 02, 1864R. DudgeonDrilldrill bits
74,490Feb. 18, 1868J.A. BidwellScrewdriver and Countersinkscrewdriver blades
93,807Aug. 17, 1869W.A. ClarkImprovement in Countersink and Bitcountersinks
103,461May 24, 1870S.E. Holbrook, Jr.Improvement in Countersinkscountersinks
108,837Nov. 01, 1870W.B. SheddImprovement in Countersinkscountersinks
110,494Dec. 27, 1870M.M. PettesImprovement in Countersinkscountersinks
112,176Feb. 28, 1871F.H. PalmerImprovement in countersinkscountersinks
123,463Feb. 06, 1872W.H. DodgeImprovement in Countersinks and Plug-Borerscountersinks
167,884Sep. 21, 1875T.P. FarmerImprovement in Countersinkscountersinks
179,778Jul. 11, 1876W.B. ErskineImprovement in countersinkscountersinks
277,859May 15, 1883R.J. WellesCountersinks for Chamfering Bits and Drillscountersinks
299,429May 27, 1884A.J. SmartCombined Drill and Countersinkcountersinks
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