Manufacture of duplex or multiplex paper with different appearance on various spots
United States Patent 1903711
Inventors:
Wendel, Reinhold M.
Publication Date:
04/11/1933
Export Citation:
Assignee:
PAPYRUS AB
Primary Class:
Other Classes:
162/303, 162/125
International Classes:
D21F11/08; D21F11/00
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