EP 0013513 B1 19840815 - SOUND ABSORBING STRUCTURE
Title (en)
SOUND ABSORBING STRUCTURE
Publication
Application
Priority
DK 4379 A 19790104
Abstract (en)
[origin: EP0013513A1] A sound absorbing structure, for instance in the form of a ceiling lining element, consisting of perforated sheet material (3) covered on one side by the foil (4), suitably of plastics, which by means of a netting (5) or in another manner, is spaced a short distance from the sheet material.
IPC 1-7
IPC 8 full level
CPC (source: EP)
E04B 1/8409 (2013.01); E04B 9/045 (2013.01); E04B 2001/8461 (2013.01); E04B 2001/8476 (2013.01)
Citation (examination)
US 3821999 A 19740702 - GUESS A, et al
Designated contracting state (EPC)
AT BE CH DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0013513 A1 19800723; EP 0013513 B1 19840815; AT E9017 T1 19840915; AU 533557 B2 19831201; AU 5426880 A 19800710; DE 2967185 D1 19840920; DK 4379 A 19800705; EG 14896 A 19861230; ES 256657 U 19810701; ES 256657 Y 19811216; FI 800007 A 19800705; JP S5592446 A 19800712; JP S6310258 B2 19880304; MX 149377 A 19831028; NO 794220 L 19800707
DOCDB simple family (application)
EP 79303073 A 19791228; AT 79303073 T 19791228; AU 5426880 A 19800102; DE 2967185 T 19791228; DK 4379 A 19790104; EG 880 A 19800105; ES 256657 U 19791228; FI 800007 A 19800102; JP 26480 A 19800104; MX 18067280 A 19800103; NO 794220 A 19791220