Do not disturb privacy manager subscriber feature within a telecommunications network
CA 2400385 A1 · Owner: Bellsouth Intellectual Property Corporation · Inventors: Gilbert, Quenton Lanny
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A "do not disturb" (DND) telephone subscriber feature is provided that prompts a caller for an access code, such as a personal identification number (PIN) and based on the caller's inputted response determines whether to complete , the call to a subscriber. If the caller enters a valid code then the call is , placed to the subscriber's phone. Otherwise the system hangs up, or , alternately, sends the caller to a voice messaging system so that the caller can leave a voice message for the subscriber.
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 February 15, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 15, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 2023.
- 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.