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| All Patents in class 242/432.4 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,542,515 | Feb. 20, 1951 | T.F. Harvey | Intermittent movement mechanism | electric motor making | |
| 2,551,521 | May 01, 1951 | J.K. Gibbs, G.R. Anderson | Coil Winding Apparatus for Magnetic Cores | wire winding machines | |