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Expired Canadian patentCanada

Atm transmission system with a variable transmission rate

CA 2038436 C · Owner: Fujitsu Limited · Inventors: Kasahara, Hiroyuki

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

A cell including a time stamp, first cell sending rate, first requested cell sending rate is transmitted from a transmitting side to a receiving side. At the receiving side a second cell sending rate is determined based on the first reqeusted cell sending rate, and a second requested sending rate is determined based on the first cell sending rate and the cell discard information. The second requested cell sending rate is transmitted from the receiving side to the transmitting side to determine the first cell sending rate based on the cell discard information detected at the receiving side. Therefore the cell sending rate is determined in accordance with a frequency of the discard of the …

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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 March 18, 1991 and granted July 21, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 18, 2011.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 18, 2013.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 18, 1991
GrantedJuly 21, 1998
Term endedMarch 18, 2011
Patent numberCA 2038436 C
Classification (IPC)H04J3/00 +2 more

Timeline

Timeline From CIPO dates

1992199419961998200020022004200620082010Application filedMarch 18, 1991Patent grantedJuly 21, 1998Term endedMarch 18, 2011

Sources & verification

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