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| Patents for Peter H. Watson | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,868 | Dec. 03, 1846 | P.H. Watson | Machinery for Cutting Screws | screw machines | |
| 5,802 | Sep. 26, 1848 | C. Learned | Washing-machine | washing machines | |
| 5,809 | Sep. 26, 1848 | J. Jones | Boring-machine | drilling and boring | |