Process of compensating for the differences travel times of group between the analog filters of a transmitter and those of a receiver of signals in quadrature phase, device and system for adaptive transmission

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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 28, 1997 and granted January 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 28, 2017.
• A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2019.
• We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.