MATRIX FOR MOLDING A POSITIVE RELIEF IMPRESSION
United States Patent 3470059

Inventors:
Jonnes, Nelson
Publication Date:
09/30/1969
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Assignee:
MINNESOTA MINING & MFG
Primary Class:
428/313.900
Other Classes:
428/317.100, 428/317.900, 101/401.100, 264/DIG.006, 156/247, 428/908
International Classes:
B41C3/00; B32B29/00; B41B5/02; B32B3/26




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