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| All Patents in class 72/222 | |||||
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| Number | Date | Patentee | Title | Type | |
| 263,519 | Aug. 29, 1882 | S.A. Hewitt | Shaping and Welding Rolls | ||
| 4,893,492 | Jan. 16, 1990 | M.B. Martincic | Roll Forging Machine and Method | forging machines | |
| 4,936,124 | Jun. 26, 1990 | M.B. Martincic | Roll Forging Machine and Method | forging machines | |