Title:
Retractable projection-screen assembly
Document Type and Number:
United States Patent 3314468

Inventors:
Herbert, Riedel
Publication Date:
04/18/1967
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Assignee:
Herbert, Riedel
Primary Class:
160/24
International Classes:
G03B21/58; G03B21/56
US Patent References:
2530877Portable screen stand
3036628Projection screen
3166115Collapsible stand for a flexible projection screen
3179161Roll screen and spring positioning means


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