Title:
Heat-sensitive copying material
United States Patent 3241997

Inventors:
Walter, Schutzner
Publication Date:
03/22/1966
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Assignee:
Walter, Schutzner
Primary Class:
430/200
Other Classes:
430/964, 428/212, 503/226, 503/208, 428/913, 428/508
International Classes:
B41M5/30; B41M5/40
US Patent References:
3147134Heat-sensitive copy sheet