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Expired Canadian patentCanada

Block oriented memory

CA 1299738 C · Owner: General Electric Company · Inventors: Christopher, Todd J.

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

RCA 84,125, Abstract of the Disclosure A video memory system which uses dynamic digital data storage elements allows random access to blocks of 32 pixel values. The pixel values to be stored in a block are applied sequentially to the memory system and the pixel values provided by the memory system are provided sequentially. The block oriented random access memory which stores and provides the blocks of 32 pixel values is configured to be able to perform a block read a block, write and a refresh operation in the time required to provide one 32 pixel block to or from the video memory system.

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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 April 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 28, 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.
FiledJanuary 28, 1988
GrantedApril 28, 1992
Term endedApril 28, 2009
Patent numberCA 1299738 C
Classification (IPC)G11C8/00 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedJan 28, 1988Patent grantedApril 28, 1992Term endedApril 28, 2009

Sources & verification

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