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| All Patents in class 409/199 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,650,522 | Sep. 01, 1953 | L.E. Godfriaux | Turn Milling Lathe | crank pin lathes | |
| 2,728,268 | Dec. 27, 1955 | P.F. Ochotschinsky, M.V. Waters, R.N. Clifton | Concavity Generating Milling Machine | milling machines | |
| 2,816,487 | Dec. 17, 1957 | J.L. Martin, H.L. Heywood, J.B. Armitage | Milling Machine | milling machines | |
| 2,835,172 | May 20, 1958 | L.D. Libby, R.E. Saving, O.W. Barker | Rotary Head Milling Attachment | milling machine accessories | |