All Patents in class 219/478


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All Patents in class 219/478
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	1,044,269	Nov. 12, 1912	C.A. Shaler	Electrical heating unit
	2,309,496	Jan. 26, 1943	G. Smith, L.F. Marsh, E.S. Bird	Heating apparatus for injection molding machines