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Expired Canadian patentCanada

Method and apparatus for the reliable transition of status signals from an interface device when using a localized sampling architecture

CA 2253028 C · Owner: Pmc-Sierra Ltd. · Inventors: Tse, Richard Tsz-Shiu; Mcdowell, Shawn Patrick

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Abstract From the Canadian patent

Method and apparatus are provided for guaranteeing that transmit cell available signals transmitted from an ATM-PHY interface device conform to a communication protocol. A previous transmit cell available signal from the previous clock cycle is stored and a transmit status signal and a transmit enable signal for the current clock cycle are sampled. One of the transmit status signal and the previous transmit cell available signal are selected as the new transmit cell available signal based upon the state of the transmit enable signal and the transmit status signal.

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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 November 5, 1998 and granted July 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 5, 2018.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 5, 2020.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 5, 1998
GrantedJuly 30, 2002
Term endedNovember 5, 2018
Patent numberCA 2253028 C
Classification (IPC)H04L29/10 +1 more

Timeline

Timeline From CIPO dates

1999200120032005200720092011201320152017Application filedNov 5, 1998Patent grantedJuly 30, 2002Term endedNov 5, 2018

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