Recording medium, recording/reproducing method and recording/reproducing apparatus
CA 2262191 A1 · Owner: Sony Corporation · Inventors: Shirane, Kyoichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disc-shaped recording medium for magnetically recording information signals, in which logical block addresses are associated with the recording tracks on, the disc in such a sequence in which the logical block addresses proceed in a recordable information area towards the outer rim side with a first recording , track at, a mid portion between the innermost recording track and the outermost recording track, on the lower disc surface as a logical starting point until reaching a second , recording, track the logical block addresses then proceeding from a third recording track at a mid, portion between the innermost recording track and the outermost recording track on, the upper disc …
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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 17, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 17, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 17, 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.