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http://www.google.com.au/patents/US2356640?utm_source=gb-gplus-share
Patent US2356640 - HANNS-HEINZ WOLFF
HANNS-HEINZ WOLFF
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Abstract
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Description
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Patent number
: 2356640
Filing date
: 3 Nov 1941
Issue date
: 22 Aug 1944
Current U.S. Classification
:
181/290
;
52/145
View patent at USPTO
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Referenced by
Citing Patent
Filing date
Issue date
Original Assignee
Title
US4477505
13 Dec 1982
16 Oct 1984
Lord Corporation
Structure for absorbing acoustic and other wave energy
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