Flexible rating of telecommunication calls
CA 2196325 C · Owner: Anderson, John Roland · Inventors: Anderson, John Roland; Swale, Richard Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
During a telephone or other connection an exchange stores information about charges to be made for that connection. To provide flexible charging the exchange responds to a charge variation request signal (200) to transmit to a party by whom a proposed charge is to be borne a signal requiring acknowledgement (206, 208) and to modify (212 214) a respective portion of , the store contents relating to said connection in progress only if such an acknowledgement is received, so as to vary the charging arrangements for , example to invoke a higher rate of charge or alternatively to change the , party by whom charges are to be borne.
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 14, 1995 and granted August 17, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 14, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 2017.
- 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.