System and method for supporting simultaneous user access to subscribed telephone services from multiple locations
CA 2282805 A1 · Owner: Nortel Networks Corporation · Inventors: Christie, Samuel H. Iv
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An intermittent extension service that is a mechanism for temporarily adding a member to a multi-appearance directory number type of service (e.g. EKTS or MADN), without sacrificing security. Service subscription data identifies the subscriber as, having ordered a specific number of simultaneous extensions. The number of extensions is then provisioned by appropriate network resources. Thereafter whenever a subscriber wishes, they can activate an additional extension by causing it, to register with the telephone network. Similarly the subscriber can de-, activate, extensions located where it is known that there is no one present to answer the phone, when it rings. Thus, the subscriber is …
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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
- Filed September 17, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 17, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 17, 2021.
- 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.