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| All Patents in class 177/259 | |||||
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| Number | Date | Patentee | Title | Type | |
| AI89 | Aug. 14, 1849 | S.A. Abbott, E. Ellicott | Lever scale for canals and railways | ||
| 2,415,570 | Feb. 11, 1947 | W.H. Ward | Weighing Scale | scales and balances | |