Store-and-forward switching system
CA 2049486 C · Owner: Kaneyama, Yoshinobu · Inventors: Kaneyama, Yoshinobu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of controlling a store-and-forward switching system comprising a store-and-forward switching central unit and a plurality of terminal units comprising the steps of detecting a call from a terminal unit through a communication control unit for controlling communication between the central unit and the terminal units, inputting a request for a normalpriority multi-destination delivery communication service from a terminal unit, reading a service attribute table from an external storage unit and loading it into a memory, referring to the service attribute table on the memory to determine whether or not the normal priority multi-destination delivery communication service is granted to …
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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 19, 1991 and granted June 7, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 19, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 2013.
- 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.