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| All Patents in class 241/140 | |||||
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| Number | Date | Patentee | Title | Type | |
| 79,581 | Jul. 07, 1868 | A. Lewis | Ore Stamp | ore processing apparatus | |
| 236,333 | Jan. 04, 1881 | F.A. Huntington | Ore crusher and pulverizer | ore processing apparatus | |