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| Patents for James Leffel, deceased (Estate of) | |||||
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| Number | Date | Patentee | Title | Type | |
| RE3,171 | Oct. 27, 1868 | J.W. Bookwalter, Executor, J.S. Goode, Executor, J. Leffel, deceased (Estate of) | Double Turbine Water Wheel | water wheels | |
| RE3,404 | Apr. 27, 1869 | J.W. Bookwalter, Executor, J.S. Goode, Executor, J. Leffel, deceased (Estate of) | Gate and Guide of Water Wheels | water wheels | |