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| All Patents in class 177/258 | |||||
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| Number | Date | Patentee | Title | Type | |
| 9,878X | Jul. 02, 1836 | J. Horton | Platform balance | ||
| 2,258,648 | Oct. 14, 1941 | H.A. Hadley | Understructure for Weighing Scales | scales and balances | |