Recording of scrambled digital data
CA 2318879 A1 · Owner: Maillard, Michel · Inventors: Benardeau, Christian; Maillard, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for transmission and recording of digital data comprising , transmission means (6) adapted to prepare and transmit scrambled digital data together with at least one encrypted control word and a digital recording device (41) adapted to receive and record the scrambled digital data and encrypted control word on a digital support (43) the digital recording device , (41) further including an access control means (42) adapted to decrypt the control word and thereafter descramble the digital data during playback. The present invention is particularly, but not exclusively adapted to the , transmission of scrambled audio data to be recorded on a mini disc reader (41).
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 12, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 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.