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All Patents in class 408/213
Patents 1 - 15 of 79
First set of recordsNext set of recordsLast set of records
6,428XMar. 21, 1831G. ShetterWood augerauger bits
12,318Jan. 30, 1855R. JenningsAugerauger bits
17,038Apr. 14, 1857A. HallExpansive bitadjustable drill bits
20,192May 11, 1858W.A. ClarkMethod of seating the movable cutter in expansive bitsadjustable drill bits
21,160Aug. 10, 1858W. TuckerVariable-Boring Bitadjustable drill bits
21,179Aug. 17, 1858C.L. BarnesBit with Detachable Cutterdrill bits
22,195Nov. 30, 1858M. NorrisAuger for woodadjustable drill bits
RE2,081Oct. 03, 1865R. JenningsImprovement in Augersauger bits
50,887Nov. 07, 1865H.T. LoveImprovement in augersauger bits
RE2,146Jan. 16, 1866R. JenningsImprovement in Augersauger bits
72,065Dec. 10, 1867J.A. McGeeImprovement in Augersauger bits
75,454Mar. 10, 1868I.T. PayneImprovement in augersauger bits
87,796Mar. 16, 1869H.L. ShailerDouble-twist augerdrill bits
90,755Jun. 01, 1869W.A. IvesImprovement in Auger-Bitsauger bits
90,759Jun. 01, 1869H.C. LewisSingle Twist Auger Bitauger bits
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