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| Patents for J. W. Hammond | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 94,241 | Aug. 31, 1869 | J.C. Chapman, A. Robes | Improvement in Pipe-Wrench and Pipe-Cutter | |
| 235,775 | Dec. 21, 1880 | F.J. Kellogg, M.K. Kellogg | Apparatus for drafting patterns | ||
 | 867,189 | Sep. 24, 1907 | H.M. Darling | Gear-cutting mechanism | |