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| All Patents in class 72/13.7 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,367,398 | Jan. 16, 1945 | J.H. Hoern | Thread Rolling Apparatus | metal threading machines | |
| 2,960,951 | Nov. 22, 1960 | C. Blerman, Jr. | Spinning Machine | metal spinning machines | |