Global management of telephone directory
CA 2078045 C · Owner: Fagan, J. Lynn · Inventors: Fagan, J. Lynn; Sestak, Mark R.; Wright, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of maintaining directory data in a switching system network having plural switching systems and a centralized directory data management system is comprised of of storing local directory data at each switching system, storing a copy of directory data of all the switching systems at the management system associating directory data entries of the directory data stored at the management system with groups of switching systems, and downloading data entries associated with each group to the switching systems designated in that group.
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 11, 1992 and granted November 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 2014.
- 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.