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| All Patents in class 409/254 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,002,924 | May 28, 1935 | E.G. Roehm, M. Romaine | Broaching Machine | broaching machines | |
| 2,333,337 | Nov. 02, 1943 | E.C. Rachrs, C.M. Beach | Broaching Machine | broaching machines | |
| 2,507,581 | May 16, 1950 | H.P. Baecker, W.P. McDonald, M.V. Waters | Safety Device for Broaching Machines | broaching machines | |
| 3,372,620 | Mar. 12, 1968 | C.F. Stuemer | Interference Detection Mechanism for Machine Tools | broaching machines | |