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| All Patents in class 264/112 | |||||
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| Number | Date | Patentee | Title | Type | |
| 467,254 | Jan. 19, 1892 | S.G. Hodges | Method of forming emery-wheels | grinding wheels | |
| 631,842 | Aug. 29, 1899 | C.A. Worden | Sharpening-machine | sharpening apparatus | |
| 2,717,422 | Sep. 13, 1955 | W.J. Stolp, O.R. Rowe | Method and means for forming sanding blocks | ||