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| All Patents in class 91/224 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 181,386 | Aug. 22, 1876 | E.S. Winchester | Rock Drilling Machine | ||
| 338,408 | Mar. 23, 1886 | G. Haydn | Motor | ||
| 607,630 | Jul. 19, 1898 | O.A. Ringbom | Steam Engine | ||