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| All Patents in class 318/136 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 909,216 | Jan. 12, 1909 | W.D. Pomeroy | Means for Starting Dynamo Machines | ||
| 3,049,635 | Aug. 14, 1962 | T.A. Hinderer | Control for Impulse Coupling | ||