All Patents in class 451/425


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All Patents in class 451/425
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	74,206	Feb. 11, 1868	H. Disston	Improvement in Machine for Grinding the Rolls of Rolling Mills
	573,528	Dec. 22, 1896	R.G. Pilkington	Apparatus for Dressing or Polishing Rolls
	659,092	Oct. 02, 1900	F.A. Nystrom	Grinding-machine
	1,285,476	Nov. 19, 1918	J. Zimmerman, W.A. Underwood	Calender Roll Grinder