Demand-assigned satellite communications system
CA 2201085 C · Owner: Nec Corporation · Inventors: Tsuda, Hiroki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mobile station comprises a power detector an averaging, circuit, and a signal fade detector. The power detector measures a channel signal power (receive signal power) of a receive signal received by a receiver. The averaging circuit averages the receive signal power measured by the power detector. The signal fade detector detects the fade of the channel signal power with the average of the receive signal power. When the fade of the receive signal is detected while, a call request or a call response is being transmitted after, the receive signal power is recovered a control circuit of the, mobile station re-transmits the call request or the call response. When the fade of the receive …
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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 26, 1997 and granted November 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 26, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 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.
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.