Insulation against losses of heat and cold
United States Patent 2001632

Inventors:
Otto, Schlichting
Publication Date:
05/14/1935
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Assignee:
Otto, Schlichting
Primary Class:
428/118
Other Classes:
29/455.100, 156/197, 428/116
International Classes:
E04B1/80; E04C2/36; F16L59/00; E04C2/34