Redundancy in voice and data communications systems
CA 2497446 C · Owner: Dunstan, Steven R. · Inventors: Dunstan, Steven R.; Bradbury, Frank K.; Khan, Parvez
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus is used in communicating in a data and voice communication system. The apparatus includes a line card (6020) and a crosspoint switch (6040) in communication with the line card. The apparatus also includes an accelerator card (6030) in communication with the line card (6020) and the crosspoint switch (6040). The crosspoint switch (6040) is configured to provide a redundant communications path between the line card (6020) and the accelerator card (6030).
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 12, 2003 and granted July 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 12, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 12, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.