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| All Patents in class 318/593 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,741,732 | Apr. 10, 1956 | F.W. Cunningham | Motor Control System for Automatic Machine Tools | numerically controlled lathes | |
| 3,175,138 | Mar. 23, 1965 | J.O. Morin, J.O. McDonough, H.P. Kilroy | Digital to Analog Decoder | electronic circuitry and apparatus | |