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Expired European patentEurope

Entrance telephone system utilizing the public subscriber telephone network

EP 0266355 B1 · Applicant: TRELL, Anders, Edvard

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Overview

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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 June 26, 1986 and granted March 18, 1992. A European patent lasts at most 20 years from filing, so its term ended June 26, 2006.
  • 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 December 26, 2011.
  • 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.
FiledJune 26, 1986
PublishedMay 11, 1988
GrantedMarch 18, 1992
Term endedJune 26, 2006
Application numberEP 86904438
Classification (CPC)H04M11/025

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedJune 26, 1986PublishedMay 11, 1988Patent grantedMarch 18, 1992Term endedJune 26, 2006

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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