Portable radio communication apparatus having diversity receptionfunction
CA 1283706 C · Owner: Nec Corporation · Inventors: Tamura, Yoshiharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a portable radio communication apparatus in which, when a sleeve antenna or a whip antenna is pulled out of a housing of the apparatus sufficient gain is attainable due to the gain of that antenna and diversity reception is achieved with that antenna and a built-in antenna. Even when the sleeve or whip antenna is tucked away in the housing, the built-in antenna is automatically switched from a receive-only condition to a transmit and receive condiition to allow transmission and reception to be performed as needed. Hence even in a system in which an answer to a reception is automatically transmitted and, then, a communication is allowed only if the answer 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
- Granted April 30, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 30, 2008.
- 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.