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European application, no grantEurope

Circuit arrangement for the automatic volume control of a loudspeaker in dependence upon an interference noise level prevailing at the loudspeaker's location

EP 0027519 A1 · Applicant: Blaupunkt-Werke GmbH

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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, 1980 and never granted as a European patent. Had it been granted, its 20-year term would have ended August 22, 2000.
  • 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, 2006.
  • 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, 1980
PublishedApril 29, 1981
GrantedNever granted
Term endedAugust 22, 2000
Application numberEP 80104994
Classification (CPC)H03G3/32

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedAug 22, 1980PublishedApril 29, 1981Term endedAug 22, 2000

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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