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| Patents for Henrik C. Sträng | |||||
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| Number | Date | Patentee | Title | Type | |
| 615,052 | Nov. 29, 1898 | H.C. Sträng | Gas Engine | gas and gasoline engines | |
| 709,060 | Sep. 16, 1902 | H.C. Sträng | Four Cycle Explosive Engine | ||