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| All Patents in class 76/82.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 709,178 | Sep. 16, 1902 | S.C. Schofield | Tool Holder and Guide for Grindstones | grinding machines | |
| 1,263,666 | Apr. 23, 1918 | M. Hastings | Lawn Mower Sharpener | sharpeners | |
| 1,271,778 | Jul. 09, 1918 | C.S. Sayre | Lawn Mower Sharpener | sharpeners | |