Overhead reduction in a communications system
CA 2481022 C · Owner: Interdigital Acquisition Corp. · Inventors: Cornett, John B. Jr.; Johnson, Kevin P.; Nelson, George R. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Parallel demodulators are provided in field units (15-1~15-h). Forward (40) and reverse (50) channel allocation information may be broadcast to the field units (15-1~15-h) in the same epoch as traffic data but on first and second channels, such as paging and traffic channels. This assures that all field units (15-1~15-h) are able to receive forward (40) and reverse (50) channel allocation information every epoch. By having parallel demodulators in the field unit (15-1~15-h), switching between the first and second channels is avoided and channel allocation information is not lost.
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 January 22, 2003 and granted May 20, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 22, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2025.
- 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.