Method and apparatus for providing diversity in hard handoff for a cdma system
CA 2256409 C · Owner: Qualcomm Incorporated · Inventors: Tiedemann, Edward G. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a communications network, a network user communicates using a remote unit (125) with another user (30) via at least one base station (B1A). The communications network has a first base station (B1A) having a first coverage area and a second base station (B2A) having a second coverage area. In the situation where communication is not established between the second base station (B2A) and the remote unit (125) in order to provide communication , between the remote unit (125) and the first base station (B1A) when the remote unit (125) is in the first coverage and simultaneously in the second coverage area, the first base station (B1A) produces a first active communication signal as …
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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 22, 1997 and granted August 2, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 22, 2019.
- 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
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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.