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| Patents for H. C. Seaman | |||||
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| Number | Date | Patentee | Title | Type | |
| 927,434 | Jul. 06, 1909 | W. Dieter, H.W. Shonnard | Air-heater for compressed-air engines | hot air engines | |
| 1,044,543 | Nov. 19, 1912 | F.M. Leavitt | Stopping device for automobile torpedoes | torpedoes | |
| 1,088,079 | Feb. 24, 1914 | F.M. Leavitt | Engine-governor | torpedoes | |
| 1,124,752 | Jan. 12, 1915 | F.M. Leavitt | Governor for automobile torpedoes | torpedoes | |