Method and device in the manufacture of paper
United States Patent 1989435

Inventors:
Ivar, Wallquist
Publication Date:
01/29/1935
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Assignee:
Ivar, Wallquist
Primary Class:
162/208
Other Classes:
19/161.100, 162/310, 162/308
International Classes:
D21F1/00; D21F1/34