All Patents in class 206/820


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All Patents in class 206/820
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
128,992	Jul. 16, 1872	S. Wheeler	Improvement in the manufacture of paper
3,268,136	Aug. 23, 1966	H.W. Huffman	Data card and method of making same