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| All Patents in class 123/268 | |||||
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| Number | Date | Patentee | Title | Type | |
| RE10,878 | Nov. 01, 1887 | J.C. Beckfeld, A. Schmid | Gas Engine | gas and gasoline engines | |
| 508,042 | Nov. 07, 1893 | A. Niemczÿk | Gas Motor | ||
| 536,090 | Mar. 19, 1895 | J. Kosakoff, V. List | Petroleum or Oil Engine | oil engines | |
| 748,011 | Dec. 29, 1903 | W. Remington | Feeding and Ingniting Device for Explosive Engines | ignition systems | |
| 1,022,178 | Apr. 02, 1912 | B. Brazelle | Internal-combustion motor | gas and gasoline engines | |