Method and apparatus for maximizing the transmission capacity of a multi-channel bidirectional communications link
CA 2011815 C · Owner: Fraser, George D. · Inventors: Grover, Wayne D.; Fong, Tommy; Krzymien, Witold A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for determining the highest, common bi-directional transmission rate between two stations of an ISDN communications link comprises the steps of a) selecting a candidate transmission rate from a range of candidate transmission rates, b) transmitting a test signal at the candidate transmission rate, through an attenuator along the link from one of the stations to the other of the, stations for a first predetermined time interval c) determining whether a , return, signal transmitted by the other station over the link and at the candidate transmission rate has been correctly received at the one station d) repeating, steps a), b) and c) until predetermined criteria have been …
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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 March 9, 1990 and granted December 18, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 9, 2012.
- 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.