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| All Patents in class 409/346 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,942,438 | Sep. 13, 2005 | S.L. Deguise | Keyway Cutter Tool and Method | keyway cutting machines | |
| 7,695,224 | Apr. 13, 2010 | P.J. Gleason | Deburring Welded Pipe | deburring apparatus | |