Title:
Sound-absorbing panels with tapered holes therethrough
United States Patent 3177970
Inventors:
Antonio, Boschi
Publication Date:
04/13/1965
Export Citation:
Assignee:
Gomma, Antivibranti Applic
Primary Class:
Other Classes:
428/137
International Classes:
E04B9/00; F16L55/02; E04B9/00; F16L55/02
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