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All Patents in class 222/199 | |||||
Number | Date | Patentee | Title | Type | |
246,392 | Aug. 30, 1881 | F.A. Huntington | Ore-feeder for crushing-mills | ore processing apparatus | |
392,562 | Nov. 06, 1888 | F.A. Huntington | Ore-feeder | ore processing apparatus | |
1,551,810 | Sep. 01, 1925 | E.R. Draver | Feeder and oscillating agitator | ||
2,353,990 | Jul. 18, 1944 | T.A. Blair | Tamping Device | railroad track maintenance tools |