A method for providing an overlay short messaging service in a mobile satellite communication system
CA 2208658 C · Owner: Comsat Corporation · Inventors: Gokhale, Dilip
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a mobile satellite communication system including a land-earth station which communicates with a mobile earth station via a satellite a method is, employed for providing an overlay short messaging service. According to the method, a short messaging service is selected. In addition, a short message is transmitted from one of the land earth station and the mobile earth station via the satellite to the other. The short message is transmitted in one of a plurality of out-of-band signalling channels. The transmission occurs at a time when no signalling information is being transmitted.
Read the whole patent
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 June 23, 1997 and granted October 31, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 23, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 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.