Information recording disc, recording and/or reproducing device and method
CA 2748699 C · Owner: Panasonic Corporation · Inventors: Nijboer, Jakob Gerrit; Moriya, Mitsurou; Kobayashi, Shoei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An information recording device records auxiliary information onto a disc recording medium having a data area for recording main data and a burst cutting area for recording the auxiliary information. A header containing an identification number and a block number is appended to auxiliary information thus generating error correction blocks each constituting a processing unit for error correction. The error correction blocks are recorded into the burst cutting area on the disc recording medium. When the same auxiliary information is arranged in each of plural said error correction blocks the block numbers of the respective error correction blocks are the same. When the auxiliary information …
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 24, 2003 and granted August 26, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 24, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 24, 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.