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| All Patents in class 451/6 | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,746,644 | May 05, 1998 | C.J. Cheetham | Centerless Grinder Assembly and Method of Operating the Same | centerless grinders | |
| 6,144,892 | Nov. 07, 2000 | C.J. Humme, C.J. Cheetham | Gauging System | measuring tools | |
| 6,227,938 | May 08, 2001 | E. Smith, B.M. Olevskiy, C.J. Cheetham | Guidewire Position Locator | centerless grinders | |
| 6,312,314 | Nov. 06, 2001 | E. Smith, B.M. Olevskiy, C.J. Cheetham | Guidewire Position Locator | centerless grinders | |