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| All Patents in class 377/2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,490,017 | Jan. 13, 1970 | T.B. Bullock, N.C. Kolell | Numerical Control Systems Employing Conversion of Changing Command Numbers Into Phase Analog Signals | nc and cnc apparatus | |
| 4,266,120 | May 05, 1981 | R. Johnstone | Unmanned Machining Center With Tool Checking | numerically controlled milling machines | |