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Expired European patentEurope

Static random access memory device with a power dissipation reduction function

EP 0337172 B1 · Applicant: KABUSHIKI KAISHA TOSHIBA

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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.

Why it's free to use

  • Filed March 23, 1989 and granted October 12, 1994. A European patent lasts at most 20 years from filing, so its term ended March 23, 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 23, 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 23, 1989
PublishedOctober 18, 1989
GrantedOctober 12, 1994
Term endedMarch 23, 2009
Application numberEP 89105246
Classification (CPC)G11C7/22 +2 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedMarch 23, 1989PublishedOct 18, 1989Patent grantedOct 12, 1994Term endedMarch 23, 2009

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