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| All Patents in class 241/69 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 285,391 | Sep. 25, 1883 | J.C. Butterfield | Mortar for stamp-mills | |
| 312,956 | Feb. 24, 1885 | H. Bolthoff | Stamp-mill | ||
 | 687,024 | Nov. 19, 1901 | N. Heid | Machine for grinding wood or like materials | |
| 1,726,435 | Aug. 27, 1929 | F.J. Haller | Comminuting machine | ||
 | 1,744,299 | Jan. 21, 1930 | A.M. Dellinger | Mill | |
 | 1,954,613 | Apr. 10, 1934 | F.A. Breeze | Cutting mechanism | |