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| All Patents in class 177/252 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 96,520 | Nov. 02, 1869 | J. Weeks | Weighing Scales | |
 | 278,903 | Jun. 05, 1883 | A.H. Emery | Platform-scale | |
 | 278,913 | Jun. 05, 1883 | A.H. Emery | Weighing-machine and dynamometer | |
| 407,747 | Jul. 23, 1889 | W.H. Stewart | Weighing Scale | ||