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Expired Canadian patentCanada

Multi-colour display unit, comprising a control arrangement for colour selection

CA 1298423 C · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Van Nes, Floris L.

CIPO record

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Abstract From the Canadian patent

PHN 11.984 09.04.1987, Abstract:, Multi-colour display unit comprising a control means for colour selection. A multi-coloured display unit is described for characters having colour indicator signals. The characters can be displayed in a plurality of colours. Without information of the identify of the characters getting lost, the legibility structure is influenced by the spreading of the colours over the various parts of the text. Initially such colours are preselected when compiling the text. However for, various implementations this spreading is sub-optimal. Consequently a, transforming device is comprised for realizing and implementing a different colour structure and hence improving 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 11, 1987
GrantedMarch 31, 1992
Term endedMarch 31, 2009
Patent numberCA 1298423 C
Classification (IPC)G09G5/00 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedDec 11, 1987Patent 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.