Method and arrangement for operating optical distribution networks
CA 2087204 A1 · Owner: Leisner, Norbert · Inventors: Belohoubek, Otto; Huynh, Hon; Leisner, Norbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is disclosed for operating optical distribution networks, in which the modulated radiation of a laser is transmitted over an optical distributer to several optical reception stations, and the reception stations are connected back to the transmission station through a monitoring unit and a return channel transmitter. In order to permit an interruption of the optical transmission path at an optical receiver for service or, measurement purposes, without disconnection of all the other optical receivers supplied by the common optical distributer, each reception station is provided with an additional signal connection. Through this additional signal connection, a signal is transmitted …
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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 January 13, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 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
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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.