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| Patents for J. W. Hammond | |||||
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| Number | Date | Patentee | Title | Type | |
| 94,241 | Aug. 31, 1869 | J.C. Chapman, A. Robes | Improvement in Pipe-Wrench and Pipe-Cutter | pipe wrenches | |
| 867,189 | Sep. 24, 1907 | H.M. Darling | Gear-cutting mechanism | gear making machines | |