Screen for picture projections
United States Patent 2476521
US Patent References:
Screen for picture projection
- - 2273074


Inventors:
Fred, Waller
Publication Date:
07/19/1949
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Assignee:
VITARAMA CORP
Primary Class:
359/451
Other Classes:
160/130, 52/201
International Classes:
G03B21/56; G03B21/58
Foreign References:
GB479913A