Communication services method and apparatus
CA 1283987 C · Owner: Dunn, Thomas Arthur · Inventors: Tam, Chun Pang; Richardson, Ross Marion; Dunn, Thomas Arthur
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Apparatus and method are disclosed for providing a nonpresubscription subaccount billing service utilized by customers on a "per call" or "as needed" basis. A calling customer initiates the service by dialing "0" plus the directory number of the called line. The local office serving the calling line recognizes the call as an operator-designated call and forwards the call along with the identification number of the calling line and the directory number of the called line to an operator system. The operator system prompts the calling line to enter additional call information. The calling customer enters a service activation code such as "15" and a two-digit subaccount billing number …
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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 May 7, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 7, 2008.
- 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.