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| All Patents in class 318/400.34 | |||||
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| Number | Date | Patentee | Title | Type | |
| 269,605 | Dec. 26, 1882 | E. Thomson | Dynamo Electric Machine | electric motors | |
| 2,578,648 | Dec. 11, 1951 | A.G. Thomas | Electromagnetic Device | milling machines | |