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| All Patents in class 60/39.25 | |||||
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| Picture | Number | Date | Patentee | Title | |
| RE3,313 | Feb. 23, 1869 | P. Shaw | Hot Air Engine | ||
 | 278,255 | May 22, 1883 | L.H. Nash | Gas Engine | |
| 642,949 | Feb. 06, 1900 | P.B. Verity, J.L. Baillie | Combustion Engine | ||