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| All Patents in class 322/69 | |||||
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| Number | Date | Patentee | Title | Type | |
| 335,659 | Feb. 09, 1886 | C.J. Van Depoele | Regulator for Dynamo Electric Machines | motor regulators | |
| 2,163,972 | Jun. 27, 1939 | G.R. Anderson | Control System for Dynamo-Electric Machines | voltage regulators | |