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All Patents in class 408/195
Patents 1 - 15 of 70
First set of recordsNext set of recordsLast set of records
9,398Nov. 16, 1852C.L. BarnesExpanding bitadjustable drill bits
13,261Jul. 17, 1855L.H. GibbsExpanding auger or bitadjustable drill 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
21,597Sep. 28, 1858W.A. ClarkExpansive bitadjustable drill bits
22,195Nov. 30, 1858M. NorrisAuger for woodadjustable drill bits
22,474Dec. 28, 1858H. StoneExpanding bitdrill bits
25,348Sep. 06, 1859H. PennieBit for Cutting Circular Washerswasher cutters
27,946Apr. 17, 1860J. BlakeAugeradjustable drill bits
50,600Oct. 24, 1865O.A. Smith, C.A. KingImproved Tool for Cutting Washers
63,882Apr. 16, 1867A.P. GrugerImproved Device for Cutting Washerswasher cutters
76,103Mar. 31, 1868A. RoffAdjustable Bit for Decorative Workadjustable drill bits
79,181Jun. 23, 1868F.T. AndrewShoemaker's Toolcobbler
82,956Oct. 13, 1868W.A. IvesImprovement in expansive bits for wood-boringadjustable drill bits
RE3,516Jun. 22, 1869W.A. ClarkImprovement in expansive bitsadjustable drill bits
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