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| Patents for David Watson | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,597X | Oct. 15, 1822 | D. Watson | Washing machine | washing machines | |
| 4,424X | May 06, 1826 | D. Watson | Machine for moulding bricks | brick maker | |
| 6,877X | Dec. 23, 1831 | D. Watson | Washing machine | washing machines | |
| 7,095X | May 29, 1832 | D. Watson | Boxes and hubs and hanging coach bodies | ||