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Expired Canadian patentCanada

Method and arrangement for setting an amplitude equalization characteristic on an equalizer for use in a modem

CA 1298362 C · Owner: Hattori, Masanori · Inventors: Hosokawa, Tsutomu; Hattori, Masanori; Yoshida, Atsushi

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Abstract From the Canadian patent

A method of selecting and setting one of a plurality of equalization characteristics assigned to an amplitude equalizer, comprising the steps of generating a plurality of reference signals each having a different predetermined frequency and the same signal level and feeding the reference signals to a transmission line separating the, respective reference signals received over the transmission line, measuring a reception level of each of the separated reference signals, determining level errors between the measured reception levels and estimated reception level each being determined beforehand in association with a respective one of the equalization characteristics and selecting one 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

  • Granted March 31, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 15, 1988
GrantedMarch 31, 1992
Term endedMarch 31, 2009
Patent numberCA 1298362 C
Classification (IPC)H04B3/06 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedDec 15, 1988Patent grantedMarch 31, 1992Term endedMarch 31, 2009

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