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| Patents for Richard Rettew | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,262,455 | Apr. 21, 1981 | R. Rettew | Head Positioning for a Belt Grinder | surface grinders | |
| 4,267,671 | May 19, 1981 | R. Rettew | Positioning Of An Abrasive Belt On A Grinding Machine | surface grinders | |