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| All Patents in class 261/40 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 423,214 | Mar. 11, 1890 | E. Butler | Hydrocarbon Motor | |
| 504,723 | Sep. 12, 1893 | A. Gray | Hydrocarbon Engine | ||
| 568,017 | Sep. 22, 1896 | H.C. Cundall, W.D. Cundall, R.D. Cundall, J.S. Cundall | Oil and Gas Motor Engine | ||
| 616,974 | Jan. 03, 1899 | C.C. Riotte | Gas Engine | ||
 | 627,219 | Jun. 20, 1899 | E.J. Woolf | Air and Gas Engine | |
| 924,673 | Jun. 15, 1909 | J.B. Knickerbocker | Carbureter | ||
| 1,212,478 | Jan. 16, 1917 | E.J. Hall | Carburetor | ||
| 1,273,845 | Jul. 30, 1918 | O.C. Funderburk | Carbureter | ||