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| All Patents in class 307/141 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,016,661 | Feb. 06, 1912 | N. Wilkinson | Circuit-controlling apparatus | motor controls | |
| 3,521,524 | Jul. 21, 1970 | R.A. Wassdorp, E.J. Hunkeler | Control Apparatus for Checking and Controlling Sequential Machine Operations | machine tool controls | |