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Expired Canadian patentCanada

Nonvolatile memory system for digital television receiver

CA 1268538 C · Owner: Itabashi, Takao · Inventors: Yamada, Hisafumi; Saito, Junya; Ichikawa, Norihito

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 method and apparatus for use with a television receiver that processes a television signal in digital form and that has the functional units of the receiver controlled by digital data stored in internal registers in which a, dedicated non-volatile memory is provided for storing initial data along with a control circuit for setting such initial data into the appropriate register so that when the receiver is adjusted for the first time following manufacture spurious data will not cause circuit elements of the receiver to be damaged.

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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 May 1, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 3, 1985
GrantedMay 1, 1990
Term endedMay 1, 2007
Patent numberCA 1268538 C
Classification (IPC)H04B1/06 +2 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedOct 3, 1985Patent grantedMay 1, 1990Term endedMay 1, 2007

Sources & verification

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