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| Patents for Henry P. Holt | |||||
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| Number | Date | Patentee | Title | Type | |
| 363,508 | May 24, 1887 | F.W. Crossley, F.H. Anderson, H.P. Holt | Pendulum Governor for Gas Motor Engines | internal combustion engine governors | |
| 370,258 | Sep. 20, 1887 | F.W. Crossley, H.P. Holt | Gas Motor Engine | gas and gasoline engines | |