All Patents in class 241/253


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All Patents in class 241/253
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
25,933	Oct. 25, 1859	W.H. Howland	Amalgamator	ore processing apparatus
757,097	Apr. 12, 1904	W.E. Copenhaver, D.L. Adelsperger, W.C. Deards	Grinding-Mill	grinding mills
790,338	May 23, 1905	A.A. Ambler	Sweep-Mill	grinding mills