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| All Patents in class 73/534 | |||||
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| Number | Date | Patentee | Title | Type | |
| 357,585 | Feb. 15, 1887 | D.H. Dugar | Steam Engine Governor | steam engine governors | |
| 639,683 | Dec. 19, 1899 | A.H. Neale | Gas Engine | gas and gasoline engines | |
| 654,140 | Jul. 24, 1900 | R. Diesel | Apparatus for Regulating Fuel-Supply of Internal-Combustion Engines | fuel systems | |
| 784,818 | Mar. 14, 1905 | C.W. Weiss | Internal Combustion Engine | oil engines | |