US359085A - Electro-magnetic ore-separator - Google Patents
US359085A US359085DA US359085A US 359085 A US359085 A US 359085A US 359085D A US359085D A US 359085DA US 359085 A US359085 A US 359085A Authority US United States Prior art keywords conical magnets ore magnetic magnetism Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.