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| Patents for John H. Watson | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 12,864 | May 15, 1855 | T.J. Knapp | Adjustable tenoning tool | |
 | 426,617 | Apr. 29, 1890 | J.I. Hales | Lock for gages | |
 | 498,137 | May 23, 1893 | H. McDonald | Wrench | |