Non-interruption transmission line switching system in a duplex transmission network
CA 2097144 A1 · Owner: Nec Corporation · Inventors: Muroi, Kiyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a duplex transmission network comprising first and second transmission lines, first and second pointer renewing units process first and second transmission line frame signals from the first and the second transmission lines into first and second device frame signals. Each transmission line frame signal comprises a virtual container (VC) and an original pointer designating a location of the VC in a transmission line frame. Each device frame signal comprises the VC and a renewed pointer designating another location of the VC in a device frame. In each pointer renewing unit a pointer, comparator (109) compares the renewed pointers of the first and the second device frame signals with each …
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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 May 27, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 27, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 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.