Antenna selecting diversity receiving apparatus
CA 2041735 C · Owner: Andoh, Akira · Inventors: Andoh, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antenna selecting diversity receiving apparatus according to the present invention utilizes the linear modulation with information about the envelope of a modulating wave included therein and is employed in a radio communication system using a TDM. An integrating circuit serves to integrate electric-field levels received by respective antennas over a predetermined period of time before a start in a time slot allotted to a radio receiver. Then a comparing, circuit makes a comparison among respective timeintegrated values corresponding to the respective antennas. In addition, a changeover control circuit serves to select an antenna corresponding to the maximum time-integrated value as the …
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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 2, 1991 and granted December 10, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 2, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 2, 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.