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All Patents in class 451/139
Patents 1 - 6 of 6
Picture	Number	Date	Patentee	Title
	567,637	Sep. 15, 1896	A.R. Clizbe	Grinding Machine
	636,192	Oct. 31, 1899	H.W. Bolens	Grinding Machine
	650,035	May 22, 1900	A.R. Clizbe	Grinding Machine
	655,753	Aug. 14, 1900	H.W. Bolens	Grinding Machine
	3,245,176	Apr. 12, 1966	A.A. Muehling	Grinding machine
	3,335,525	Aug. 15, 1967	A.A. Muehling	Hydraulic system for grinding machines

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