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Expired Canadian patentCanada

Video signal coding apparatus, coding method used in the video signal coding apparatus and video signal coding transmission system having the video signal coding apparatus

CA 2029320 C · Owner: Fujitsu Limited · Inventors: Sakai, Kiyoshi; Matsuda, Kiichi; Itoh, Takashi

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Abstract From the Canadian patent

A signal coding apparatus, which is coupled via a transmission path, to a receiver having a receiver buffer and a decoder, includes a coding unit for coding a signal and outputting information generated in a frame unit, the information being a coded signal. The apparatus also includes a transmitter buffer for temporarily storing the information, and a controller for controlling an amount of the information on the basis of a storage capacity of the receiver buffer and an amount of the information which is contained in a frame per a unit time. There is also provided a method used in the above coding apparatus, and a signal coding transmission system employing the signal coding apparatus.

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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, 1990 and granted August 16, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 5, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 5, 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.
FiledNovember 5, 1990
GrantedAugust 16, 1994
Term endedNovember 5, 2010
Patent numberCA 2029320 C
Classification (IPC)H04N7/12 +1 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedNov 5, 1990Patent grantedAug 16, 1994Term endedNov 5, 2010

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