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| All Patents in class 123/650 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 267,458 | Nov. 14, 1882 | A.K. Rider | Electrical Igniting Device for Gas Engines | ||
| 390,710 | Oct. 09, 1888 | H.K. Shanck | Gas Engine | ||
| 587,747 | Aug. 10, 1897 | P. Mueller | Igniter for Explosive Engines | ||