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Expired Canadian patentCanada

Colour television transmission or data storage system

CA 1232057 A · Owner: N.V.Philips'Gloeilampenfabrieken · Inventors: Tan, Sing L.; Van De Polder, Leendert J.; De Haan, Gerard

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

34, ABSTRACT:, In the system an encoding circuit in the data generator transmits or stores identification information relating to variable numbers of television lines or variable portions of television lines in which luminance and chrominance information occurs, compressed where appropriate. The data receiver comprises a simple properly, adaptable decoding circuit which comprises presettable counters for counting portions of television lines and for counting television lines, outputs of these counters being coupled to address inputs of a programmable memory which is coupled to a multiplexer which is switchable by the identification information and is followed by a logic circuit for …

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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 January 26, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 26, 2005.
  • 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 2, 1984
GrantedJanuary 26, 1988
Term endedJanuary 26, 2005
Patent numberCA 1232057 A
Classification (IPC)H04N11/02 +2 more

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedMay 2, 1984Patent grantedJan 26, 1988Term endedJan 26, 2005

Sources & verification

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