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| All Patents in class 318/47 | |||||
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| Number | Date | Patentee | Title | Type | |
| 530,177 | Dec. 04, 1894 | L. Gutmann | Alternating electric motor | electric motors | |
| 1,073,662 | Sep. 23, 1913 | J. Burke | Means for controlling synchronous machines | synchronous motors | |
| 1,102,116 | Jun. 30, 1914 | J.J. Wood | Dynamo-electric machine | electric motors | |