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| All Patents in class 241/149 | |||||
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| Number | Date | Patentee | Title | Type | |
| 210,610 | Dec. 10, 1878 | F.A. Huntington | Improvement in ore-stamps | ore processing apparatus | |
| 312,956 | Feb. 24, 1885 | H. Bolthoff | Stamp-mill | ||