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| Patents for Fritz Dürr | |||||
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| Number | Date | Patentee | Title | Type | |
| 442,248 | Dec. 09, 1890 | F. Dürr | Gas and Petroleum Engine | ||
| 625,387 | May 23, 1899 | F. Dürr | Valveless two-Cycle Hydrocarbon Engine | gas and gasoline engines | |