All Patents in class 423/23


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All Patents in class 423/23
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	9,296X	Dec. 28, 1835	J. Curtis	Amalgam mills for separating gold from the ore
	9,297X	Dec. 28, 1835	J. Curtis	Amalgam mills for separating gold from the ore