Title:
Frame and closure therefor
Document Type and Number:
United States Patent 2423987

Inventors:
Simon, Levikow
Publication Date:
07/15/1947
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Referenced by:
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Assignee:
Simon, Levikow
Primary Class:
160/35
Other Classes:
160/207
International Classes:
E06B3/48; E06B3/32
US Patent References:
0474259
1992006Automatic spring apparatus to raise overhead doors
0788761
1927294Door


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