Method for equalization of complementary carriers in an am compatible digital audio broadcast system
CA 2345616 A1 · Owner: Usa Digital Radio Partners, L.P. · Inventors: Goldston, Don R.; Hartup, David Carl; Matherne, Marcus M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is provided for equalizing an amplitude modulated compatible digital broadcasting signal which includes an amplitude modulated radio frequency signal having a first frequency spectrum the amplitude modulated radio , frequency signal having a first carrier modulated by an analog program signal a plurality of digitally modulated carrier signals positioned within a bandwidth which encompasses the first frequency spectrum a first group of the , digitally modulated carrier signals including complementary signals and lying within the first frequency spectrum, and second and third groups of the digitally modulated carrier signals including non-complementary signals and lying outside …
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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 September 2, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 2, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 2, 2021.
- 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.