Transmission apparatus for round-trip satellite
CA 2116733 C · Owner: Nawata, Hizuru · Inventors: Nawata, Hizuru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transmission apparatus for an orbiting satellite which can establish stabilized frame synchronization even if the distance between the orbiting satellite and a communications terminal varies and which can minimize the displacement between a frame signal received on the ground and another frame signal generated in a communications terminal. The transmission apparatus comprises M (M is a an integral number equal to or greater than 2) composers for forming frame signals, M transmitters for outputting M spot beams having different radiation directions, and M delay circuits interposed between the composers and the transmitters. The delay times of the delay circuits are set so that they are …
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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 March 1, 1994 and granted March 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 1, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 1, 2016.
- 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.