Communication network intended for secure transmission
CA 2067411 C · Owner: Nost, Jan Petter · Inventors: Nost, Jan Petter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a communication network intended for secure transmission of speech and data including different, types of subscriber terminals (1-4) and switching modules (7-8), where subscriber lines (23-26) connect each subscriber terminal with a switching module and transmission links (19-22) connect each switching module to other switching modules in the network, where transmission links and subscriber lines each carry one or more communication channels and where the, network further comprise crypto devices (13-15) to undertake encryption/decryption or other required protection mechanisms of information transmitted through the network and where at, least one of the crypto …
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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 April 28, 1992 and granted April 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 28, 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.