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| Patents Granted on 1983-04-__ | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,380,722 | Apr. 19, 1983 | N.E. Oltendorf | Accommodation circuit for a step motor | electric motors | |
| 4,380,796 | Apr. 19, 1983 | L.D. Ostby | Portable Control Box for Computer Numerically Controlled Machine Tools | machine tool controls | |
| D268,740 | Apr. 26, 1983 | T. Tanada | Micrometer | micrometers | |