Method of copying
United States Patent 3103881

Inventors:
Grieshaber, Emil W.
Publication Date:
09/17/1963
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Assignee:
MINNESOTA MINING & MFG
Primary Class:
430/203
Other Classes:
101/DIG.029, 101/471, 101/136, 430/348, 430/205, 430/302, 250/318
US Patent References:
2764085Masters for planographic printing
2769391Method of manufacturing imaged hectograph spirit master
2800077Planographic printing plates and methods for manufacturing same
2808777Method for manufacturing duplicating masters
2813043Heat-sensitive copying-paper
2859351Method of making permanent facsimile copies
2910377Heat-sensitive copying-paper
2916395Heat-sensitive copy-paper
2919349Shadow thermoprinting