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| Number | Title | Issue Date |
| 7588396 | End mill An end mill is provided having an axis of rotation, a shank section and a fluted section, each extending along the axis of rotation, and a plurality of helical teeth. The fluted section has a first end attached to the shank section and a second end. The plurality of... | 09/15/2009 |
| 7223053 | Helical flute end mill with multi-section cutting edge An end mill is provided that includes a shank section and a fluted section. One or more helical teeth are disposed along an outer surface of the fluted section. Each helical tooth has a cutting surface and a relief wall that intersect to form an angle defining a hel... | 05/29/2007 |