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| All Patents in class 177/216 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,518,982 | Dec. 09, 1924 | E. Harrold | Weighing scale | ||
| 2,055,965 | Sep. 29, 1936 | J.W. Bryce | Scale | ||
| 2,341,779 | Feb. 15, 1944 | H.P. Holt | Sector Arm for Weighing Scales | scales and balances | |