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| Patents for Eugene P. Woillard | |||||
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| Number | Date | Patentee | Title | Type | |
| 581,385 | Apr. 27, 1897 | E.P. Woillard | Gas or Vapor Engine | cylinders | |
| 586,409 | Jul. 13, 1897 | E.P. Woillard | Gas or Vapor Engine | gas and gasoline engines | |