Automatic power control apparatus
CA 2047870 C · Owner: Tsutsumi, Shyuitsu · Inventors: Tsutsumi, Shyuitsu; Yamada, Tatsuya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An automatic power control apparatus according to the present invention comprises a level varying unit such as a variable amplifier for amplifying a modulated wave output from a transmitter at an amplification factor specified by an external device, a level detecting unit such as a level detector circuit for detecting a power level of the modulated wave output from the level varying unit, a computing unit such as a high-speed computing unit for, during a period other than a time slot assigned to the transmitter, computing a power level of a non-modulated wave which is varied by a modulated wave obtained by linearly modulating a carrier wave in response to a modulation signal generated based …
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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 July 25, 1991 and granted December 16, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 25, 2013.
- 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.