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| Patents for Thomas H. Watson | |||||
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| Number | Date | Patentee | Title | Type | |
| 44,358 | Sep. 20, 1864 | T.H. Watson | Improvement in hydraulic jacks | hydraulic jacks | |
| 302,070 | Jul. 15, 1884 | T.H. Watson | Hydraulic jack | hydraulic jacks | |