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| All Patents in class 76/40 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,590,992 | Apr. 01, 1952 | J. McEwan | Saw sharpener | saw sharpening machines | |
| 2,607,243 | Aug. 19, 1952 | J. McEwan | Saw sharpener | saw sharpening machines | |
| 2,625,842 | Jan. 20, 1953 | J. McEwan | Saw sharpening machine | saw sharpening machines | |
| 2,780,945 | Feb. 12, 1957 | J.A. Wilhelm, J. McEwan | Saw sharpener | saw sharpening machines | |