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Expired European patentEurope

Circuits, systems and methods for modifying data stored in a memory using logic operations

EP 0823116 B1 · Applicant: CIRRUS LOGIC, INC.

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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 April 19, 1996 and granted June 2, 1999. A European patent lasts at most 20 years from filing, so its term ended April 19, 2016.
  • 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 October 19, 2021.
  • 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.
FiledApril 19, 1996
PublishedFebruary 11, 1998
GrantedJune 2, 1999
Term endedApril 19, 2016
Application numberEP 96912973
Classification (CPC)G11C7/00 +1 more

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedApril 19, 1996PublishedFeb 11, 1998Patent grantedJune 2, 1999Term endedApril 19, 2016

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