Transmultiplexer
CA 2246799 A1 · Owner: Macdonald, Robert I. · Inventors: Macdonald, Robert I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transmultiplexing device is provided having a first optical circulator and a multiplexer, optically coupled to a feeder waveguide for feeding and demultiplexing a multiplexed, signal into the a switching network and for multiplexing and extracting a demultiplexed, signal from the switching network. A second optical circulator and a multiplexer, optically coupled to a distributor waveguide are provided for feeding and demultiplexing, a multiplexed signal into the a switching network and for multiplexing and extracting a, demultiplexed signal from the switching network. The single pair of WDM devices act, simultaneously as multiplexers and demultiplexers.
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 8, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 8, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 2020.
- 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.