Optical information transmission network
CA 2062072 A1 · Owner: Alcatel N.V. · Inventors: Doringer, Kurt; Strasser, Helmut; Wolfgang, Johann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Optical information transmission system for the bidirectional transmission of communication signals between a central station (1) and several subscriber units (5) which has the, central station (1) connected to an outside-line-plant-equipment (3) via one or two monomode optical fibres which is shared by a, group of subscribers (5) and is installed close to them and which has the subscriber units (5) connected to the outside-line-plantequipment (3) via optical fibres; the subscriber units (5) have optical transmitters whose optical output signal is not adapted to the transmission characteristics of monomode optical fibres and, the outside-line-plant-equipment (3) contains a converter (10 …
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 February 28, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 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.