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| All Patents in class 409/286 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,024,251 | Dec. 17, 1935 | M. Romaine | Broaching Machine | broaching machines | |
| 2,173,396 | Sep. 19, 1939 | F.J. Lapointe | Broaching machine | ||