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| All Patents in class 209/222 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,688,403 | Sep. 07, 1954 | A. Anderson | Magnetic separator | separators | |
| 3,341,021 | Sep. 12, 1967 | K.H. Casson | Magnetic separator | separators | |