Information storage medium and method and apparatus of recording and/or reproducing data on and/or from the same
CA 2515489 C · Owner: Samsung Electronics Co. Ltd. · Inventors: Hwang, Wook-Yeon; Otsuka, Tatsuhiro; Kim, Tae-Kyung
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An information storage medium and a method of recording data on and/or reproducing data from the information storage medium includes an information , storage medium having at least one information storage layer. Data is recorded in the form of protruding or indented pits in the entire or partial area of the information storage medium, and information regarding the protruding or indented pits is recorded. Smooth tracking can be achieved using the information regarding the protruding or indented pits that is, push-pull , polarity 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 May 20, 2004 and granted July 8, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 20, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 20, 2026.
- 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.