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| Patents for Wilhelm Wittig | |||||
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| Number | Date | Patentee | Title | Type | |
| 213,539 | Mar. 25, 1879 | W. Hees, W. Wittig | Gas-Engine | gas and gasoline engines | |
| 225,778 | Mar. 23, 1880 | W. Hees, W. Wittig | Gas-Engine | gas and gasoline engines | |