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| All Patents in class 177/234 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,396 | Jan. 06, 1844 | G.R. Moore | Pendulum Scales | scales and balances | |
| 2,021,489 | Nov. 19, 1935 | K. Rauch | Scale | ||
| 2,033,318 | Mar. 10, 1936 | H. Abramson | Indicator gear for measuring instruments and the like | special measuring tools | |