Voice-response paging device and method
CA 2228232 C · Owner: At&T Corp. · Inventors: Shively, Richard Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention solves the current problem of allowing ad-hoc(manual) voice response by a user to a page received by a paging device. In one aspect of the invention a, paging device includes a digital signal processor for receiving and compressing a voice response to a page prior to transmission back to the paging party. In further aspects of the invention, the speech is first recorded and compressed and then transmitted to a wireless base station for subsequent transmission to the calling party.
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 January 30, 1998 and granted October 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2020.
- 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.