Digital satellite direct broadcast system
CA 2270134 A1 · Owner: Harris, G. Christopher · Inventors: Campanella, S. Joseph; Harris, G. Christopher
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A satellite direct radio broadcast system (10) assemblies bits of broadcast programs into prime rate increments assembled into a frame (100). Frames (100) are divided into symbols which are demultiplexed into a plurality of prime rate channels (110). The prime rate channels (110) are demultiplexed into corresponding broadcast frequencies (21) for transmission to a satellite (25). An on board demultiplexer (144) separates uplink signals into time division multiplexed streams of symbols (154). A phase shift keying demodulator (146) demodulates the symbols into digital baseband data. The satellite payload switches the symbols into time division multiplexed data streams using two …
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 October 31, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 31, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 31, 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.