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| All Patents in class 318/614 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,422,448 | Jun. 17, 1947 | W. Trible | Remote Control Means for Speed Change Mechanism | milling machines | |
| 2,511,956 | Jun. 20, 1950 | T.A. Wetzel | Tracer Controlled Machine Tool | milling machines | |
| 3,444,446 | May 13, 1969 | S. Lenders, F.G. Burg | Fine-medium-coarse servomotor position control | drill presses | |