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| All Patents in class 409/319 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,646,727 | Jul. 28, 1953 | O. Waldrich | Planing Machine | metal planers | |
| 2,940,368 | Jun. 14, 1960 | G.E. Marx, J.M. Walter | Machine Tool | metal planers | |
| 3,040,632 | Jun. 26, 1962 | G.E. Marx, J.M. Walter | Double Action Cutting Tool | metal planer tool holders | |
| 6,942,438 | Sep. 13, 2005 | S.L. Deguise | Keyway Cutter Tool and Method | keyway cutting machines | |