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| All Patents in class 48/190 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 649,713 | May 15, 1900 | D. Barckdall, W.J. Woodward | Explosive Engine | ||
| 680,346 | Aug. 13, 1901 | W.S. Hamm, J.A. Mosher | Piping System for Gas Distribution | ||