Automated telephone directory
CA 2195355 C · Owner: Brandon, Donald · Inventors: Brandon, Donald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The automated telephone directory of the present invention combines a telephone, a telephone directory and a telephone log into a single computerized unit. The primary directory database contains the directory information for an entire geographical region (i.e. city state, province or, country) and is accessed by a central processing unit to facilitate the placing of telephone calls and to create incoming and outgoing logs. Several other databases are created automatically or can be created manually to enhance the telephoning process. The system also includes the means to send and receive alphanumeric page messages. A display screen is provided to display upon command of the CPU, the …
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 January 17, 1997 and granted July 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 17, 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.