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Patents for John R. Cooper
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
58,765Oct. 16, 1866G.W. BishopImprovement in friction-clutch pulleysindustrial machine pulleys and belt drive mechanisms
73,571Jan. 21, 1868L.R. BoydImprovement in the manufacture of locking-rings for closing fruit-jarsfood containers
75,199Mar. 03, 1868H.S. RossWrenchself-adjust wrenches
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