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Expired Canadian patentCanada

Elastic store memory circuit

CA 2021348 C · Owner: Izawa, Naoyuki · Inventors: Kakuma, Satoshi; Aso, Yasuhiro; Uchida, Yoshihiro

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An elastic store memory circuit includes first and second elastic store memories. Each of the first and second elastic store memories generates a phase comparison signal when a phase difference between a write timing and a read timing is within a predetermined phase range. The elastic store memory circuit also includes a selector which selects either the input data read out from the first elastic store memory or the input data read out from the second elastic store memory, and a slip signal generator for generating a slip signal on the basis of a write reset timing at which the first and second elastic store memories are reset, a read reset timing at which the first and second elastic store …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Filed July 17, 1990 and granted May 24, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 17, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 2012.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 17, 1990
GrantedMay 24, 1994
Term endedJuly 17, 2010
Patent numberCA 2021348 C
Classification (IPC)G11C7/00 +1 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedJuly 17, 1990Patent grantedMay 24, 1994Term endedJuly 17, 2010

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.