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| All Patents in class 123/504 | |||||
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| Number | Date | Patentee | Title | Type | |
| 426,337 | Apr. 22, 1890 | C. Sintz | Gas Engine | carburetors | |
| 1,862,132 | Jun. 07, 1932 | E.T. Adams | Injection Pump | fuel pumps | |
| 1,989,891 | Feb. 05, 1935 | C.G. Sprado | Fuel Injection Device | oil engines | |