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| All Patents in class 123/252 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 415,908 | Nov. 26, 1889 | K. Gramm | Petroleum Motor Engine | ||
| 437,507 | Sep. 30, 1890 | N.A. Otto | Petroleum or Oil Motor Engine | ||
| 453,446 | Jun. 02, 1891 | O. Lindner | Hydrocarbon Engine | ||
 | 748,011 | Dec. 29, 1903 | W. Remington | Feeding and Ingniting Device for Explosive Engines | |