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| Patents for Warren P. Freeman | |||||
| Number | Date | Patentee | Title | Type | |
| 313,488 | Mar. 10, 1885 | W.P. Freeman | Dynamo Electric Machine | electric motors | |
| 313,489 | Mar. 10, 1885 | W.P. Freeman | Commutator for dynamo electric machine | motor commutators | |
| 644,591 | Mar. 06, 1900 | W.P. Freeman | Electric drill, &c. | drill presses | |