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Expired Canadian patentCanada

Shared memory with benign failure modes

CA 2128595 C · Owner: American Telephone And Telegraph Company · Inventors: Merritt, Michael John; Afek, Yehuda; Taubenfeld, Gadi

CIPO record

Overview

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

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Abstract From the Canadian patent

Memories which have new benign failure modes. The new failure modes are the omission-crash mode and the eventual-crash mode. Memories having either of thesemodes fail more benignly than memories having the omission failure mode but, unlike memories having the crash failure mode memories with the novel failure, modes may be used to construct gracefully-degrading fault tolerant objects. Implementations of memories with the new failure modes are disclosed along withimplementations of fault-tolerant objects made from memories with the new failure modes.

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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 21, 1994 and granted August 4, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 21, 2014.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 21, 2016.
  • 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 21, 1994
GrantedAugust 4, 1998
Term endedJuly 21, 2014
Patent numberCA 2128595 C
Classification (IPC)G06F9/46 +1 more

Timeline

Timeline From CIPO dates

1995199719992001200320052007200920112013Application filedJuly 21, 1994Patent grantedAug 4, 1998Term endedJuly 21, 2014

Sources & verification

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