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Expired European patentEurope

Ported loudspeaker system and method with reduced air turbulence

EP 0776591 B1 · Applicant: Britannia Investment Corporation

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed August 22, 1995 and granted August 3, 2005. A European patent lasts at most 20 years from filing, so its term ended August 22, 2015.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by February 22, 2021.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledAugust 22, 1995
PublishedJune 4, 1997
GrantedAugust 3, 2005
Term endedAugust 22, 2015
Application numberEP 95930898
Classification (CPC)H04R1/2849 +1 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedAug 22, 1995PublishedJune 4, 1997Patent grantedAug 3, 2005Term endedAug 22, 2015

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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