Tdma radio communication apparatus
CA 2068822 A1 · Owner: Hashimoto, Kazuya · Inventors: Hashimoto, Kazuya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A TDMA (Time Division Multiple Access) radio communication apparatus having a receive frequency mixer and a transmit frequency mixer. The receive and transmit frequency mixers are implemented by a single frequency mixer. Signal selecting means is connected to each of the input and output of the single frequency mixer for separating a high frequency signal and an intermediate frequency (IF) signal. When a received high frequency signal is fed from a receive high frequency filter to the mixer, the resulting IF signal from the mixer is delivered to a demodulator. When an IF signal to be transmitted is fed from a modulator to the mixer, the resulting high frequency signal from the mixer is …
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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 May 15, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 2014.
- 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.