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| Patents for Feodor Hirsch | |||||
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| Number | Date | Patentee | Title | Type | |
| 518,717 | Apr. 24, 1894 | F. Hirsch | Igniter for Gas Engines | ignition systems | |
| 532,555 | Jan. 15, 1895 | F. Hirsch | Gas Engine | gas and gasoline engines | |