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| All Patents in class 318/122 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,938,762 | Dec. 12, 1933 | F.S. Haas | Grinding Machine | cylindrical grinders | |
| 2,441,404 | May 11, 1948 | J.B. Engle, B.N. Engle | Device for setting saw teeth | saw sharpening machines | |