Building insulation and method for producing same
United States Patent 2200713

Inventors:
Ericson, Walter M.
Wenzel, Edwin H.
Publication Date:
05/14/1940
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Assignee:
Wenzel
Primary Class:
52/742.130
Other Classes:
52/404.300, 220/DIG.009, 252/378P, 252/62, 222/636, 241/60
International Classes:
E04F21/12; E04F21/02