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| All Patents in class 91/36 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,473,572 | Jun. 21, 1949 | E.A. Ruchty, N.D. Cooper | Magnetic Servo Operator | machine mechanisms | |
| 2,500,933 | Mar. 21, 1950 | L.A. Dailey | Control device for machine tools | drilling and boring | |
| 3,538,813 | Nov. 10, 1970 | J.Y. Cromeens, T.E. Clyce | Remote control system | machine mechanisms | |