Title:
Magnetically retained window shade roller
Document Type and Number:
United States Patent 3104700

Inventors:
David, Polsky
Publication Date:
09/24/1963
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Assignee:
David, Polsky
Primary Class:
160/298
Other Classes:
160/291, 188/83, 160/DIG.016, 335/302
International Classes:
E06B9/78; E06B9/90; E06B9/56; E06B9/80
US Patent References:
2011382Brake for electric motors
2055511Roller curtain and operating means therefor
2341440Shade
2515708Window screen
2959832Flexible or resilient permanent magnets
3079535Variable strength permanent magnets


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