Panel construction having a cellular core
United States Patent 2840430

Inventors:
Ephraim, Winer
Publication Date:
06/24/1958
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Assignee:
NAT PLASTIC PRODUCTS COMPANY
Primary Class:
Other Classes:
52/802.100, 52/793.100
International Classes:
E04C2/36; E04C2/34
Foreign References:
GB429301A