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| Patents for Charles Watson | |||||
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| Number | Date | Patentee | Title | Type | |
| 513,196 | Jan. 23, 1894 | J. O'Donnell | Stone-cutter's bush-hammer | stoneworking tools | |
| 648,318 | Apr. 24, 1900 | A.G. Lotz, C. Watson | Coffee Roasting Apparatus | coffee roasters | |