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| Patents for William Williamson | |||||
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| Number | Date | Patentee | Title | Type | |
| GB-179,201,910 | Oct. 18, 1792 | W. Williamson | Steam engine for mines, mills, turning wheels, or raising water | steam pumping engines | |
| XC-1,038 | Feb. 18, 1860 | W. Williamson | A certain barrel head machine | cooper | |
| 575,538 | Jan. 19, 1897 | W. Williamson | Drill and Tap Machine | drill presses | |