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Patents for John R. Cooper | |||||
Number | Date | Patentee | Title | Type | |
58,765 | Oct. 16, 1866 | G.W. Bishop | Improvement in friction-clutch pulleys | industrial machine pulleys and belt drive mechanisms | |
75,199 | Mar. 03, 1868 | H.S. Ross | Wrench | self-adjust wrenches |