Communication link checking method and apparatus
CA 2119441 C · Owner: Hydro-Quebec · Inventors: Tremblay, Gilles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A checking apparatus (2) allowing a user to select and check communications links (6) in a first communications system connecting an intermediate station (8) with remote stations (10). Each remote station (10) includes a further communications link for establishing a second communications system between the intermediate station and the remote stations.
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 December 9, 1992 and granted June 4, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 9, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 9, 2014.
- 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.