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| All Patents in class 318/575 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,651,746 | Sep. 08, 1953 | J.J. Gano | Control Device | milling machines | |
| 2,741,732 | Apr. 10, 1956 | F.W. Cunningham | Motor Control System for Automatic Machine Tools | numerically controlled lathes | |
| 3,215,915 | Nov. 02, 1965 | A.O. Fitzner | Phase Sensitive Servo Control System | machine tool controls | |