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| All Patents in class 177/152 | |||||
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| Number | Date | Patentee | Title | Type | |
| 7,432X | Feb. 19, 1833 | J.B. Maag | Balance platform | ||
| 9,077X | Sep. 09, 1835 | J. Mardin | Balance Platform, Scale for weighing | scales and balances | |