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| All Patents in class 177/157 | |||||
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| Number | Date | Patentee | Title | Type | |
| 442,720 | Dec. 16, 1890 | F.H. Richards | Grain-weigher | ||
| 2,281,838 | May 05, 1942 | H.A. Hadley | Beam Locking Device | scales and balances | |
| 2,336,407 | Dec. 07, 1943 | E.J. Lynch | Control Means for Weighing Scales | scales and balances | |