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| All Patents in class 74/67 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 584,130 | Jun. 08, 1897 | F.C. Griswold | Gas Engine | ||
 | 1,687,609 | Oct. 16, 1928 | H.A. Gehres | Driving Mechanism for Engine Accesories | |