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Patents for James H. Bancroft
Patents 1 - 15 of 15
First set of recordsLast set of records
NumberDatePatenteeTitleType
20,379May 25, 1858G.C. TaftReverse double screw nut wrenchnut wrenches
23,725Apr. 19, 1859G.C. TaftImproved Double Acting Screw-Wrenchnut wrenches
23,798Apr. 26, 1859G.C. TaftImproved Double-Acting Screw and Rack Wrench.nut wrenches
24,247May 31, 1859G.C. TaftManufacturing the Heads and Shanks of Screw Wrencheswrench jaw components
30,431Oct. 16, 1860G.C. TaftImprovement in Screw-Wrenchesscrew adjust wrenches
30,774Nov. 27, 1860G.C. TaftDrill Framedrill presses
34,137Jan. 14, 1862J. EdgecombImprovement in boring-machinesdrilling and boring
40,590Nov. 10, 1863G.C. TaftImprovement in Wrenchesnut wrenches
41,747Feb. 23, 1864G.C. TaftImproved Screw-Wrenchnut wrenches
43,775Aug. 09, 1864J.N. JacobsMaking Filesfiles
55,932Jun. 26, 1866G.C. TaftImprovement In Wrencheswrench handle components
80,237Jul. 21, 1868G.C. TaftImprovement in Wrenchesscrew adjust wrenches
89,517Apr. 27, 1869G.C. TaftImprovement in Wrenchwrench jaw components
98,644Jan. 04, 1870G.C. TaftWrenchscrew adjust wrenches
135,613Feb. 04, 1873E.J. WorcesterImprovement in drilling-machinesdrill presses
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