Attendant-controlled call message delivery system and method
CA 2022263 C · Owner: American Telephone And Telegraph Company · Inventors: Russell, Thomas L. Jr.; Parrott, Dawn R.; Hsiao, Tung-Hai
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A Call Message Delivery system (CDS) enables an attendant to control the delivery of a recorded call message from a caller to a specified party at a called station. The CDS alerts the attendant at a delivery time selected by either the caller, or the system. When the attendant determines that the specified party has answered the call at the called station, the caller's recorded call message is outputted to the specified party. If the specified party is not available the attendant may schedule the, call for a later delivery or may forward the call to another station specified by the answering party at the called station.
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 July 30, 1990 and granted January 18, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2012.
- 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.