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| All Patents in class 241/108 | |||||
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| Number | Date | Patentee | Title | Type | |
| 44,819 | Oct. 25, 1864 | J.T. Plass | Improvement in machines for crushing ores | ||
| 338,221 | Mar. 16, 1886 | W.R. Eynon | Grinding-mill | corn grinders | |