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| All Patents in class 177/219 | |||||
| Number | Date | Patentee | Title | Type | |
| 2,006,864 | Jul. 02, 1935 | J.J. Klosterman | Scale | ||
| 2,054,190 | Sep. 15, 1936 | H.B. Bradshaw | Scale | ||
| 2,315,789 | Apr. 06, 1943 | H.A. Hadley | Automatic Dial Scale | scales and balances | |
| 3,260,321 | Jul. 12, 1966 | J.B. Rolfe, R.H. Damon, Jr. | Dual Capacity Scale with Disengageable Counterweight on Load Transmission Rod | scales and balances | |