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| All Patents in class 177/251 | |||||
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| Number | Date | Patentee | Title | Type | |
| 44,611 | Oct. 11, 1864 | S. Darling | Weighing Apparatus | scales and balances | |
| 100,066 | Feb. 22, 1870 | W.B. Preston | Improvement in steelyards | scales and balances | |