Cdma system which uses pre-rotation before transmission
CA 2652083 A1 · Owner: Kaewell, John D. · Inventors: Kaewell, John D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digital spread spectrum communication system calculates phase and frequency error , on a received signal from a communicating entity during a wireless communication and , pre-corrects a signal for phase and frequency error prior to transmission to that entity.
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 March 28, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 28, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 28, 2023.
- 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.