Bit synchronisation for optical networks
CA 1301251 C · Owner: Blank, Lutz C. · Inventors: Lord, Andrew; Blank, Lutz C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A submarine optical telecommunications system has two shore based transmitting stations whose signals are combined at a passive, submerged junction. Phase errors are caused by variations in transmission times to the junction. an error signal is generated at the first repeater after the junction. The error signal which, represents the phase errors, is transmitted to a shore station where it is used to adjust the sending phase. A surface acoustic wave filter tuned to half the frequency of the combined signal is the preferred way to generate the error signal.
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
- Granted May 19, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 2009.
- 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.