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| All Patents in class 409/262 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,815,647 | Jul. 21, 1931 | L.H. Blood | Broaching Machine | broaching machines | |
| 1,848,044 | Mar. 01, 1932 | L.H. Blood | Broaching Machine | broaching machines | |
| 2,838,980 | Jun. 17, 1958 | W.F. Babcock | Continuous broaching machines | broaching machines | |