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Expired Canadian patentCanada

Information registering and retrieval system

CA 1292075 C · Owner: Sharp Kabushiki Kaisha · Inventors: Kita, Sumio

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 image registering and retrieval system comprises a plurality of first memories each for storing each of a plurality of blocks into which image information is divided, a plurality of second memories each for storing compressed data of each of the plural blocks of the image information, a plurality of compressing and restoring sections each provided for each block of the image information so as to compress the image information or restore the compressed data; and a display. device for displaying the image information, the plurality of compressing and restoring sections processing the image information simultaneously.

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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 November 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 2008.
  • 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 26, 1987
GrantedNovember 12, 1991
Term endedNovember 12, 2008
Patent numberCA 1292075 C
Classification (IPC)H04N1/21 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedOct 26, 1987Patent grantedNov 12, 1991Term endedNov 12, 2008

Sources & verification

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