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| All Patents in class 177/173 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,549,190 | Apr. 17, 1951 | F.W. Gilchrist | Weighing Scale Indicator | |
| 3,031,021 | Apr. 24, 1962 | J.B. Rolfe, J.D. Hale | Magnetic Balance Indicator | ||
| 3,224,520 | Dec. 21, 1965 | R.H. Damon, Jr. | Transducer Mounting in Weighing Apparatus | ||
| 3,266,583 | Aug. 16, 1966 | J.D. Hale | Scale Indicator Mechanism Controlling Container Weighing and Filling Operations | ||