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Expired Canadian patentCanada

Elastic buffer circuit

CA 2016255 C · Owner: Tokunaga, Atsuhiko · Inventors: Tokunaga, Atsuhiko

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

An elastic buffer circuit for adjusting the timing between a satellite communication system of a time division multi-access (TDMA) type and a ground communication system is provided with a stable oscillator for generating a first clock signal whose frequency is N (N is an integer not smaller than 2) times the received clock frequency a clock generating circuit for generating a second clock signal by frequency-dividing the first clock signal by N and, at the same time, setting the phase of the second clock signal on the basis of a sync code detection signal, and a data memory circuit for temporarily storing data signals in accordance with the second clock 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 May 8, 1990 and granted July 26, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 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.
FiledMay 8, 1990
GrantedJuly 26, 1994
Term endedMay 8, 2010
Patent numberCA 2016255 C
Classification (IPC)H04B7/15 +1 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedMay 8, 1990Patent grantedJuly 26, 1994Term endedMay 8, 2010

Sources & verification

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