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| All Patents in class 409/246 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,024,253 | Dec. 17, 1935 | E.G. Roehm, M. Romaine | Broaching Machine | ||
| 2,049,623 | Aug. 04, 1936 | E.G. Roehm | Broaching Machine | ||
| 2,194,568 | Mar. 26, 1940 | W. Trible, M. Romaine | Broaching Machine | ||
| 2,507,581 | May 16, 1950 | H.P. Baecker, W.P. McDonald, M.V. Waters | Safety Device for Broaching Machines | ||
| 3,372,620 | Mar. 12, 1968 | C.F. Stuemer | Interference Detection Mechanism for Machine Tools | ||