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| All Patents in class 91/363R | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,404,127 | Jul. 16, 1946 | H. Ernst | Sensitive Control Mechanism | naval guns | |
| 3,014,390 | Dec. 26, 1961 | H. Schiott, E. Persson, A. Garde | Control Equipment for Copying Machine Tools | tracer controlled lathes | |
| 3,017,863 | Jan. 23, 1962 | N.V. Gusching, W.H. Ulman | Electrical control system | ||
| 3,958,492 | May 25, 1976 | R.A. Curless | Electrically Compensated Electrohydraulic Servo System With Position Related Feedback Loop | machine tool controls | |