Anonymous voice communication
CA 2206174 A1 · Owner: At&T Corp. · Inventors: Leipow, Robert Bernard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a trusted agent for anonymous voice communication using telephones. The trusted agent includes an access network communications unit a memory, device and a voice bridge processor coupled to the memory device and the access network communications unit. The voice bridge processor receives information through the access network communications unit from at least one user and connects the at least one user to a telephone network for anonymous voice communication. The voice bridge processor displays to the at least one user a display panel prompting the at least one user to enter a telephone number and an identification. The voice bridge processor searches the memory device …
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 May 26, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 26, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 26, 2019.
- 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.