Method for automatically initiating a calling card telephone call
CA 2209357 C · Owner: Kovacs, Frank Jr. · Inventors: Kovacs, Frank Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A calling card telephone call may be automatically initiated by the aid of an intelligent card (10) having the capability of generating a first and second sequences of DTMF signals. Upon actuating the card in a first manner the card generates the first DTMF signal sequence that corresponds to a calling card carrier access number. Upon actuating the card in a second manner the card generates the second DTMF signal sequence corresponding to a card holder personal identification code. Thus by actuating the card in the first and second manner a card holder can effectuate the input of the carrier access number and card holder personal identification number respectively, without having to enter …
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 June 30, 1997 and granted August 15, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 30, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 30, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.