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| Patents for Frederick Ayres Johnson | |||||
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| Number | Date | Patentee | Title | Type | |
| 597,418 | Jan. 18, 1898 | F.A. Johnson | Regulation of dynamo-electric machinery | electric motors | |
| 597,419 | Jan. 18, 1898 | F.A. Johnson | Regulation of dynamo-electric machinery | electric motors | |
| CA-66,038 | Jan. 31, 1900 | F.A. Johnson | Dynamo electric machine | electric motors | |