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| All Patents in class 241/15 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,465,941 | Aug. 28, 1923 | E.K. Hill | Machine for Granulating Metal Turnings and Borings | grinding machines | |
| 3,690,568 | Sep. 12, 1972 | D.K. Alexander | Wood grinding | paper making machines | |