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| Patents for H. D. Snow | |||||
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| Number | Date | Patentee | Title | Type | |
| 25,769 | Oct. 11, 1859 | H.D. Snow | Governor Valve | steam engine governors | |
| RE1,309 | May 13, 1862 | H.D. Snow | Improvement in Governor-Valves | steam engine governors | |