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| All Patents in class 123/528 | |||||
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| Number | Date | Patentee | Title | Type | |
| 596,809 | Jan. 04, 1898 | C. Guyer | Gas Engine | gas and gasoline engines | |
| 2,863,436 | Dec. 09, 1958 | R.H. Beadle | Fuel Regulating Means for Gas Engines | fuel systems | |