Heat-sensitive copy-sheet
United States Patent 3129109

Inventors:
Workman, Wesley R.
Publication Date:
04/14/1964
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Assignee:
MINNESOTA MINING & MFG
Primary Class:
Other Classes:
503/223, 430/964, 503/218, 430/495.100, 428/913, 430/346, 252/1
International Classes:
B41M5/323; B41M5/30