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Patents for Joseph Curtis
Patents 1 - 3 of 3
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NumberDatePatenteeTitleType
9,295XDec. 28, 1835J. CurtisAmalgam mills for separating gold from the oreore processing apparatus
9,296XDec. 28, 1835J. CurtisAmalgam mills for separating gold from the oreore processing apparatus
9,297XDec. 28, 1835J. CurtisAmalgam mills for separating gold from the oreore processing apparatus
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