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| All Patents in class 377/22 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,238,363 | Apr. 15, 1941 | H.A. Hadley | Electrical Impulse Weight Recorder | scales and balances | |
| 2,963,222 | Dec. 06, 1960 | K.C. Allen | Computing and ticket printing scale | ||
| 3,665,169 | May 23, 1972 | L.E. Miller, R. Zechlin, R.M. Henderson | Electronic Measuring Unit | electrical measuring apparatus | |