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| Patents for Edward P. Cowles | |||||
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| Number | Date | Patentee | Title | Type | |
| 154,846 | Sep. 08, 1874 | E.P. Cowles | Traction Engines | steam traction engines | |
| 7,033,237 | Jun. 24, 1902 | E.P. Cowles | Variable Friction Gearing | metalworking variable speed mechanisms | |