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| All Patents in class 177/249 | |||||
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| Number | Date | Patentee | Title | Type | |
| 278,913 | Jun. 05, 1883 | A.H. Emery | Weighing-machine and dynamometer | testing machines | |
| 407,747 | Jul. 23, 1889 | W.H. Stewart | Weighing Scale | scales and balances | |
| 2,680,014 | Jun. 01, 1954 | M.H. Starr | Tyoe Registering Poise | scales and balances | |