Unattended meet-me-conference controlled by a telephone terminal
CA 2108739 C · Owner: American Telephone And Telegraph Company · Inventors: Fidder, Ted Mathew; Gallagher, Donald Dean; Thieler, Stephen Max
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Creating the capability of a meet-me-conference call on a telephone terminal by actuation of a meet-me-conference button on the telephone terminal. The meet-me-conference button is actuated for a particular line appearance and the, meet-me-conference is then established by other telephone terminals calling the telephone number associated with that line appearance. The user of the telephoneterminal can join the conference at a later point in time by going off-hook. As other parties call that line appearance, the telephone terminal adds them to the conference. As parties join the conference their names are displayed on the telephone terminal and a second button on the telephone terminal can …
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 October 19, 1993 and granted September 16, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 19, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 2015.
- 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.