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Expired Canadian patentCanada

Decoding apparatus

CA 1265621 C · Owner: Odaka, Kentaro · Inventors: Ozaki, Shinya; Fukami, Tadashi; Odaka, Kentaro

CIPO record

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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 decoding apparatus in which the operation to write error correction coded data into a memory and a decoding processing operation of the data read out of the memory are executed in parallel. This decoding apparatus comprises: a comparator for comparing the address to write the data into the memory with the address in the memory for the decoding processing operation; and control means for inhibiting the writing operation when it is detected by the comparator that the decoding processing operation is precedent to the writing operation. With this apparatus the data which, was subjected to the correcting process is prevented from being rewritten into the memory and the pointer derived by 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 February 6, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 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.
FiledFebruary 23, 1987
GrantedFebruary 6, 1990
Term endedFebruary 6, 2007
Patent numberCA 1265621 C
Classification (IPC)G11B20/10 +1 more

Timeline

Timeline From CIPO dates

1988199019921994199619982000200220042006Application filedFeb 23, 1987Patent grantedFeb 6, 1990Term endedFeb 6, 2007

Sources & verification

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