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| All Patents in class 242/573.8 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,335,602 | Nov. 30, 1943 | L.W. Nash, G.A. Martin | Collapsible mandrel | sheet metal | |
| 2,920,837 | Jan. 12, 1960 | J.K. Wingard | Tension reel jaw | sheet metal | |