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Coupling field with parallel input stages for digital switching systems

EP 0579845 A1 · Applicant: SIEMENS AKTIENGESELLSCHAFT

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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 July 14, 1992 and never granted as a European patent. Had it been granted, its 20-year term would have ended July 14, 2012.
  • 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 January 14, 2018.
  • 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.
FiledJuly 14, 1992
PublishedJanuary 26, 1994
GrantedNever granted
Term endedJuly 14, 2012
Application numberEP 92111996
Classification (CPC)H04Q11/08

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedJuly 14, 1992PublishedJan 26, 1994Term endedJuly 14, 2012

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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