System and method for accessing data files in a computer network
CA 2215228 C · Owner: Byford, Derrick John · Inventors: Byford, Derrick John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system receives a call from a user via a telephone in which the user requests data files from, a computer network. A Teletext page is allocated to the user by the system and identified by a, number. The system generates a menu in the allocated Teletext page and includes it in a broadcast, television signal from which the user makes a selection by pushing a number on the telephone, keypad. The number identifies a data file on the computer network. The system writes the, information from the requested file to the Teletext page included in the television broadcast signal.
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 September 12, 1997 and granted July 8, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 12, 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.
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.