Stencil screen and method of making the same
United States Patent 2209499

Inventors:
Wulf, Charles A.
Publication Date:
07/30/1940
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Assignee:
Wulf, Charles A.
Primary Class:
430/270.100
Other Classes:
430/308, 430/6, 101/128.210, 430/320
International Classes:
G03F7/12