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| All Patents in class 72/238 | |||||
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| Number | Date | Patentee | Title | Type | |
| 500,286 | Jun. 27, 1893 | W. Lewis | Bending-roll | metal bending machines | |
| 1,406,004 | Feb. 07, 1922 | P.R. Hahnemann | Metal Working Machine | thread rolling machines | |
| 2,336,621 | Dec. 14, 1943 | R.G. Tourneau | Continuous bar mill | steel maker | |
| 3,323,344 | Jun. 06, 1967 | L.D. Mersek | Roll Forging Machine | forging machines | |