Radio repeater
CA 2072335 C · Owner: Mitsubishi Denki Kabushiki Kaisha · Inventors: Torin, Shigetsune; Kondo, Yasuhiro; Kawano, Minori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A radio repeater receives signals having reception frequencies, converts the received signals into signals having carrier frequencies, and transmits the converted signals. The radio repeater is applicable to communication in a cordless telephone system a, land-mobile radiotelephone system, or the like. With a conventional radio repeater, receivers and transmitters have to be installed for respective frequencies respectively. With this radio repeater an, intermediate-frequency converter and a transmission power amplifier are used for both transmission and reception of signals in common, thereby reducing the number of component parts, and making the repeater compact.
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 June 25, 1992 and granted January 6, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 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.