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| All Patents in class 242/432.6 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,370,744 | Mar. 08, 1921 | F. Diehl | Winding-machine | ||
| 1,612,026 | Dec. 28, 1926 | W. Jannell | Winding machine | ||
| 2,551,521 | May 01, 1951 | J.K. Gibbs, G.R. Anderson | Coil Winding Apparatus for Magnetic Cores | ||