A signaling system for broadband communications networks
CA 2118352 C · Owner: American Telephone And Telegraph Company · Inventors: La Porta, Thomas F.; Veeraraghavan, Malathi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A network architecture is designed to allow a communications service subscriber to select a signaling provider independently of a) the transport carriers, which control the local loops for particular communications services and b) , the, providers of those services. Upon the establishment of a signaling connection from a, subscriber's terminal device to the signaling provider's network the latter , requests, those services from the service providers selected by the subscriber for delivery over, the local loops of the transport providers.
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 October 18, 1994 and granted April 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2016.
- 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.