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Patents for William A. Clark
Patents 1 - 15 of 19
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19,142Jan. 19, 1858W.A. Clark, J.D. HeatonCorn Huskercorn huskers
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
24,722Jul. 12, 1859W.A. ClarkImproved device for fastening cutters of hollow augershollow bits
28,653Jun. 12, 1860W.A. ClarkAdjustable hollow augerhollow bits
34,944Apr. 15, 1862W.A. ClarkImprovement in bullet-molds
86,364Feb. 02, 1869W.A. ClarkImprovement in Hollow Augershollow bits
RE3,516Jun. 22, 1869W.A. ClarkImprovement in expansive bitsadjustable drill bits
93,807Aug. 17, 1869W.A. ClarkImprovement in Countersink and Bitcountersinks
93,808Aug. 17, 1869W.A. ClarkImprovement in Hollow Augerhollow bits
94,870Sep. 14, 1869W.A. ClarkImproved Washer-Cutterwasher cutters
RE3,733Nov. 16, 1869W.A. ClarkImprovement in expansive bitsadjustable drill bits
RE4,668Dec. 12, 1871W.A. ClarkImprovement in expansive bitsadjustable drill bits
121,707Dec. 12, 1871W.A. ClarkImprovement in Hollow Augershollow bits
RE5,393May 06, 1873W.A. ClarkImprovement in Hollow-Augershollow bits
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