Diversity transmission and reception method and equipment
CA 2000321 C · Owner: Sumitomo Electric Industries, Ltd. · Inventors: Akaiwa, Yoshihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TITLE OF THE INVENTION, "DIVERSITY TRANSMISSION AND RECEPTION METHOD AND EQUIPMENT", ABSTRACT OF THE DISCLOSURE In an antenna-selection diversity transmission and reception equipment which is in digital communication with a transmission and reception equipment having a single antenna and performs transmission and reception with time division by using the same radio frequencies, the antenna-selection diversity transmission and reception equipment comprises a plurality of antennae, a receiving part having a receiving unit, comparing-unit and selecting unit which are adapted for a receiving-antenna selection diversity and a transmitting, part having a memory unit for storing antenna …
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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 October 6, 1989 and granted April 5, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 6, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 2011.
- 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.