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| All Patents in class 318/810 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,028,599 | Jun. 07, 1977 | F. Zankl, E.E. Kirkham, R.E. Stobbe, J.J. Schachte | Method of Controlling an A.C. Motor | machine tool controls | |
| 4,091,294 | May 23, 1978 | F. Zankl, E.E. Kirkham, R.E. Stobbe, J.J. Schachte | A.C. Motor Control Apparatus and Method | motor controls | |
| 4,126,819 | Nov. 21, 1978 | R.E. Stobbe, M.R. Cesarz | Interlock Circuit for Complementary Electronic Switches | motor controls | |