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Expired European patentEurope

Coil switching device

EP 0334775 B1 · Applicant: SGS-THOMSON MICROELECTRONICS S.A.

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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 March 15, 1989 and granted October 13, 1993. A European patent lasts at most 20 years from filing, so its term ended March 15, 2009.
  • 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 September 15, 2014.
  • 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.
FiledMarch 15, 1989
PublishedSeptember 27, 1989
GrantedOctober 13, 1993
Term endedMarch 15, 2009
Application numberEP 89420091
Classification (CPC)G11B15/02 +1 more

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.