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Magnetic Iron Ore Magnetic Separator Thomas Edison

US675056A US64041897A US1897640418A US675056A US 675056 A US675056 A US 675056A US 64041897 A US64041897 A US 64041897A US 1897640418 A US1897640418 A US 1897640418A US 675056 A US675056 A US 675056A Authority US United States Prior art keywords magnetic magnet polar stream bar Prior art date 1897-06-12 Legal status The legal status is an assumption and is not

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