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| Patents for Henry J. Hartig | |||||
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| Number | Date | Patentee | Title | Type | |
| 415,197 | Nov. 19, 1889 | H.J. Hartig | Gas Engine | gas and gasoline engines | |
| 451,047 | Apr. 28, 1891 | H.J. Hartig | Governor for Engines | internal combustion engine governors | |
| 674,580 | May 21, 1901 | H.J. Hartig | Speed-Regulator for Explosive-Engines | internal combustion engine governors | |