Storage device authentication system
CA 2361356 A1 · Owner: Sony Computer Entertainment Inc. · Inventors: Asano, Tomoyuki; Yoshimori, Masaharu; Ishibashi, Yoshihito
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To transfer data between a storage device and a recording/reproducing apparatus, key blocks where key data for authentication is stored are produced in the storage device, and the recording / reproducing apparatus designates one of the key blocks and performs authentication between them according to the key data stored in the designated key block.
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 26, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 26, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 26, 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.