Dial-up switching and transmission of broadband communication channels through a local exchange
CA 2106745 C · Owner: Martens, Gregory Alan · Inventors: Martens, Gregory Alan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A telephone exchange provides dial-up switched connections for customers' broadband data terminal equipment (DTE). In response to data receivedover an associated narrowband channel the exchange establishes a broadband, transmission path to a broadband DTE associated with the narrowband channel. Upon receiving a number for the called party broadband DTE over the narrowband channel, the switch establishes an interoffice broadband channel for communications between the originating and destination DTE.
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 22, 1993 and granted December 16, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2015.
- 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.