Meet-me conference with control capabilities
CA 1252548 A · Owner: American Telephone And Telegraph Company · Inventors: Stanley, Keith R.; Winchell, David F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A communication network having a meet-me conference bridge is disclosed. The conference is accessed by each conferee dialing a code assigned to the bridge. A conference host is given a special code which accesses the same bridge but identifies the host as the controller who can add on other conferees and perform other special functions.
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
- Granted April 11, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 11, 2006.
- 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.