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| All Patents in class 123/315 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 438,209 | Oct. 14, 1890 | A.R. Middleton, C. White | Gas Engine | ||
| 545,995 | Sep. 10, 1895 | A.R. Middleton, C. White | Gas Engine | ||