Patent Yard Sign in
Expired Canadian patentCanada

Atm switch and control method thereof

CA 2049366 C · Owner: Nakano, Yukio · Inventors: Gohara, Shinobu; Ashi, Yoshihiro; Kozaki, Takahiko

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

An ATN switch including ECC encoder circuits each for generating, for an ATM cell as an information symbol, an ECC check symbol and for adding the ECC check symbol thereto, cell partitioning circuits each for subdividing an information field of an ATM cell into N partial cells, for subdividing a check symbol field into M partial cells, and for assigning an identical routing tag to the obtained partial cells (N + M) partial cell switches for respectively routing the (N + M) partial cells in an independent fashion based on the routing tag and ECC decoder circuits for receiving the (N + M) partial cells thus routed and for achieving an error correction on the received partial cells.

Read the whole patent

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

  • Filed August 16, 1991 and granted December 8, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 16, 2011.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 2013.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 16, 1991
GrantedDecember 8, 1998
Term endedAugust 16, 2011
Patent numberCA 2049366 C
Classification (IPC)H04Q1/20 +2 more

Timeline

Timeline From CIPO dates

1992199419961998200020022004200620082010Application filedAug 16, 1991Patent grantedDec 8, 1998Term endedAug 16, 2011

Sources & verification

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