Title:
Method of preparing and using hectographic masters
United States Patent 3241965


Inventors:
Wilhelm, Ritzerfeld
Gerhard, Ritzerfeld
Application Number:
US7477160A
Publication Date:
03/22/1966
Filing Date:
12/09/1960
Assignee:
Wilhelm, Ritzerfeld
Gerhard, Ritzerfeld
Primary Class:
Other Classes:
101/471, 101/472, 430/306, 430/327, 430/376, 430/394
International Classes:
G03F7/06
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