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All Patents of Type: ore processing apparatus
Patents 1 - 15 of 68
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NumberDatePatenteeTitleType
2,016XOct. 27, 1813H. AlexanderGrinding and reducing ores into powder and preparing them for various usesore processing apparatus
2,079XMar. 16, 1814T. GreggAir furnace for melting ores, refining and heating iron with stone coalore processing apparatus
2,140XMay 27, 1814D. WalworthMelting ores and metalsore processing apparatus
NX-2,640Jul. 05, 1816N. RockwellMill for grinding, washing, etc, gold and silver oresore processing apparatus
NX-3,741Aug. 21, 1823u. unknownGold Washingore processing apparatus
5,000XFeb. 13, 1828W.H. FolgerMachine for separating and collecting goldore processing apparatus
5,562XJul. 08, 1829R. LeeMachine for washing, cleaning, and separating gold dust, etc.ore processing apparatus
5,634XSep. 10, 1829W.H. FolgerMachine for washing alluvial earth, clay, and soft ores, and separating and saving the gold from the sameore processing apparatus
5,715XNov. 18, 1829W.H. FolgerMills for grinding, washing, and separating gold and silver from ores, earth, or in whatever state these metals may be found...ore processing apparatus
5,780XJan. 15, 1830J. Smith, S.C. WhistlerSeparating and grinding goldore processing apparatus
5,809XJan. 30, 1830P. SummeyWashing gold from gravel and sandore processing apparatus
5,991XMay 22, 1830T.W. SumterWashing gold and separating alluvialore processing apparatus
6,138XOct. 01, 1830R. KingSeparating Gold by a Vibrating Circular Cylindrical Troughore processing apparatus
6,139XOct. 01, 1830R. KingVertical cylindrical gold washerore processing apparatus
6,213XNov. 01, 1830V. DeRivafinoli, C. Harsleben, W. DavisMachine for washing gold ores and alluvial soilsore processing apparatus
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