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| All Patents in class 409/248 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,024,251 | Dec. 17, 1935 | M. Romaine | Broaching Machine | broaching machines | |
| 2,024,252 | Dec. 17, 1935 | E.G. Roehm, M. Romaine | Broaching Machine | broaching machines | |
| 2,044,829 | Jun. 23, 1936 | H.C. Anderson, E.P. Bullard | Apparatus for Stationary Work Turning | ||
| 2,119,902 | Jun. 07, 1938 | L.H. Blood | Machine Tool Transmission and Control Mechanism | metal shapers | |