Power efficient paging for mobile users in a terrestrial and satellite communications system
CA 2278103 C · Owner: Ohlson, John E. · Inventors: Natali, Francis D.; Ohlson, John E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of paging assigns a unique digital address to mobile stations (12) with each unique digital address being mapped into an orthogonal signal set which is then transmitted to all mobile stations (12). Each mobile station (12) then correlates a received orthogonal signal function against an orthogonal function corresponding to its address. More particularly each , orthogonal signal set comprises a binary orthogonal signal set such as a set of Rademacher-Walsh functions. Other well-known orthogonal function sets can be employed. For example, an mbit address can be partitioned into g binary sequences and each sequence is then uniquely mapped into one of 2 to the power of m/g …
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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 January 21, 1998 and granted December 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 21, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 21, 2020.
- 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.