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| All Patents in class 408/158 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,159,060 | Dec. 01, 1964 | W.N. Miles | Offset Boring Head | boring heads | |
| 4,154,555 | May 15, 1979 | F.C. Skrentner | Multiple Boring Head | boring heads | |
| 4,354,305 | Oct. 19, 1982 | W.E. Keller, H.R. Plummer | Contouring and Threading Attachment for Multi Function Machine Tools | metalworking machine mechanisms | |