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| All Patents in class 123/146.5R | |||||
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| Number | Date | Patentee | Title | Type | |
| 573,296 | Dec. 15, 1896 | F.J. Rettig | Igniter for Gas Engines | ignition systems | |
| 583,495 | Jun. 01, 1897 | H.B. Maxwell | Gas Engine | gas and gasoline engines | |
| 951,833 | Mar. 15, 1910 | W.J. McVicker | Controlling Mechanism for Explosive Engines | internal combustion engine governors | |