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| All Patents in class 72/240 | |||||
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| Number | Date | Patentee | Title | Type | |
| 7,917X | Dec. 31, 1833 | R.W. Bangs, S.D. Walbridge | Rolling iron and steel | steel maker | |
| 2,612,934 | Oct. 07, 1952 | P.P. Dubosclard | Forming roll machine | sheet metal forming rolls | |