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Patents for Matthew E. Campfield
Patents 1 - 9 of 9
First set of recordsLast set of records
NumberDatePatenteeTitleType
99,155Jan. 25, 1870M.E. CampfieldImprovement in mortising-machinemortising machines
166,587Aug. 10, 1875M.E. CampfieldImprovements in Screw-Wrencheswrench handle components
257,468May 09, 1882M.E. CampfieldWrenchscrew adjust wrenches
285,796Oct. 02, 1883M.E. CampfieldImprovements in Blanks for Forging the Hammer-Jaws of Monkey Wrencheswrench jaw components
303,385Aug. 12, 1884M.E. CampfieldMaking Screws For Monkey Wrencheswrench components
354,770Dec. 21, 1886M.E. CampfieldWrenchquick adjust wrenches
371,302Oct. 11, 1887M.E. CampfieldRapid Transit Monkey Wrenchquick adjust wrenches
380,859Apr. 10, 1888M.E. CampfieldCombined Nut and Pipe Wrenchquick adjust wrenches
395,213Dec. 25, 1888M.E. CampfieldMachine For Truing and Dressing Wrench Blanks
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