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| All Patents in class 241/291 | |||||
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| Number | Date | Patentee | Title | Type | |
| 285,391 | Sep. 25, 1883 | J.C. Butterfield | Mortar for stamp-mills | ore processing apparatus | |
| 384,704 | Jun. 19, 1888 | W. Merrill | Machine for cutting wood | cutterheads | |
| 408,143 | Jul. 30, 1889 | W.X. Stevens | Ink-grinding slab | ||
| 930,921 | Aug. 10, 1909 | F. Bartz | Meat-cutter | meat grinders | |
| 1,027,537 | May 28, 1912 | C.F. Haldeman | Feed-cutter | ||