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| Patents for Woolf Valve Gear Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 627,219 | Jun. 20, 1899 | E.J. Woolf | Air and Gas Engine | gas and gasoline engines | |
| 627,220 | Jun. 20, 1899 | E.J. Woolf | Air and Gas Engine | gas and gasoline engines | |