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| All Patents in class 177/178 | |||||
| Number | Date | Patentee | Title | Type | |
| 1,993,592 | Mar. 05, 1935 | F.M. Carroll | Weighing scale | ||
| 2,224,281 | Dec. 10, 1940 | G.D. Webber | Measuring Instrument | measurement gauges | |
| 2,723,113 | Nov. 08, 1955 | J.M. Sherman, D.A. Meeker | Scale | ||