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| All Patents in class 451/909 | |||||
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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 | |
| 7,147,542 | Dec. 12, 2006 | T. Morris, K. Jobes, J. Memmelaar, Sr. | Centerless Grinder | centerless grinders | |