US325129A Ore concentrator Google Patents
Ore concentrator . Download PDF Info Publication number US325129A. US325129A US325129DA US325129A US 325129 A US325129 A US 325129A US 325129D A US325129D A US 325129DA US 325129 A US325129 A US 325129A Authority US United States Prior art keywords ore frame bed substantially toggles Prior art date 1885 08 25 Legal status The legal status is an assumption and is



































