Title:
THERMAL-BARRIER BETWEEN INNER AND OUTER FRAMES OF DOUBLE FRAME WINDOW STRUCTURE
United States Patent 3436884

Inventors:
Bell, John Harold
Daniels, Everett Eugene
Publication Date:
04/08/1969
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Assignee:
WEATHER PROOF CO THE
Primary Class:
52/202
Other Classes:
49/504, 49/DIG.001, 52/393, 49/501, 49/425
International Classes:
E06B3/263; E06B3/04; E06B1/68; E06B3/26; E06B1/18




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