Method of synchronizing satellite switched cdma communication system
CA 2203475 C · Owner: At&T Corp. · Inventors: Gerakoulis, Diakoumis Parissis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method of synchronizing CDMA processing in a satellite communication system connecting multi-point ground stations. The method is comprised of the steps of acquiring access and synchronization signals transmitted by a satellite at a terrestrial subscriber unit setting a reference propagation delay time and establishing a propagation delay in terms of arrival of a message in relation to one of a plurality of quantified timing marks subsequent to the reference propagation delay time when the satellite receives a first signal from the terrestrial subscriber unit on an access channel. The method further comprises the steps of conveying the established …
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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 April 23, 1997 and granted August 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 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
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.