Symbol switching of cdma channels
CA 2197261 C · Owner: Erving, Richard Henry · Inventors: Miller, Robert Raymond Ii; Gerakoulis, Diakoumis Parissis; Erving, Richard Henry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digital switch included within a satellite processes uplink beams and, the included traffic channels at a symbol level instead at a bit level. In this system the switch performs as a repeater on the per user basis and as a switch at the beam level. Individual user signals (i.e. channels) are separated from the uplink beam and recombined into the appropriate downlink beam.
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 February 11, 1997 and granted March 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 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.