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| All Patents in class 451/475 | |||||
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| Number | Title | Classification(s) | |||
| 1,925,709 | Cylinder grinding tool | 451/475, 451/476 | |||
| 1,957,485 | Cylinder grinding tool adjusting mechanism | 451/150, 451/440, 451/475 | |||
| 1,987,457 | Cylinder grinding tool | 451/475 | |||
| 2,343,500 | Honing apparatus | 451/475 | |||