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| All Patents in class 123/261 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,159,341 | Nov. 02, 1915 | C.B. Jahnke, F.G. Hobart | Oil Engine | ||
| 1,324,978 | Dec. 16, 1919 | A. Peter | Oil Engine | ||
| 1,448,745 | Mar. 20, 1923 | C.B. Jahnke, F.G. Hobart | Movable Oil Injector | ||
| 2,165,176 | Jul. 04, 1939 | N. Fodor | Internal Combustion Engine | ||