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| All Patents in class 29/DIG.076 | |||||
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| Number | Date | Patentee | Title | Type | |
| 481,275 | Aug. 23, 1892 | R. Dutton | Machine for grinding mower-knives | sharpeners | |
| 665,380 | Jan. 01, 1901 | B.F. Barnes | Grinding-wheel support | ||