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| All Patents in class 409/253 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,170,010 | Feb. 01, 1916 | M.A. Smith | Automatic metal-shaping machine | |
 | 2,025,070 | Dec. 24, 1935 | E.E. Nygren | Metal cutting machine | |
| 2,047,034 | Jul. 07, 1936 | M. Romaine, E.G. Roehm | Broaching Machine | ||