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| All Patents in class 318/657 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,741,732 | Apr. 10, 1956 | F.W. Cunningham | Motor Control System for Automatic Machine Tools | ||
| 3,136,936 | Jun. 09, 1964 | R.H. Eisengrein | Machine Tool Control System | ||
| 3,347,116 | Oct. 17, 1967 | J.F. Reuteler, A.R. Hollister, R.F. Anderson | Automatic Measuring Lead Screw Compensator | ||