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| All Patents in class 42/51 | |||||
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| Number | Date | Patentee | Title | Type | |
| 234X | Feb. 14, 1799 | B. Dearborn | Improvement in Steelyards | scales and balances | |
| 1,515X | May 21, 1811 | J.H. Hall, W. Thornton | Firearms | firearms | |