Car-mounted booster for plug-in connection with mobile telephone set
CA 2064129 C · Owner: Kobayashi, Shinichi · Inventors: Hirasawa, Naoki; Kobayashi, Shinichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A car telephone included in a car telephone system and selectively operable in a car-mounted mode or in a portable mode. A portable unit and a telephone antenna constitute a mobile car telephone set while a car antenna a power amplifier unit, a curled cord, a connection unit constitute a car-mounted telephone together with the portable unit. The car telephone operates in a unique manner in a car-mounted mode. The power amplifier unit converts a received signal from a base station included in the system to an intermediate frequency (IF) signal by a receiving mixer and feeds the IF signal to the curled cord. The IF signal is transferred to a demodulator included in the portable unit over a …
Read the whole patent
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, 1992 and granted March 4, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 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.