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| Patents Granted on 1977-12-20 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,064,395 | Dec. 20, 1977 | D.G. O'keefe, D.L. Carnahan, K.E. Schubeler | Machine Control System Employing a Programmable Machine Function Controller | machine tool controls | |