Method and apparatus for telephone prize opportunities
CA 2130417 C · Owner: American Telephone And Telegraph Company · Inventors: Kasday, Leonard Ralph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A telephone network is modified so that callers making telephone calls can engage in a game of chance to win a prize without having had to specially dial the game processor, i.e. the telephone numbers of the telephone calls are independent of the game processor. In one embodiment of the invention the game, processor is part of the switch that processes calls through a telecommunications network. Upon conclusion of the game, the caller is supplied with an indication as to whether or not he is a winner and will receive a prize. The determination that acaller is a winner need be made only if the call was successfully completed that is, routed to a destination at which the call is answered. …
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 August 18, 1994 and granted September 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 18, 2016.
- 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.