Drive and method for determining the type of optical record carrier
CA 2576259 C · Owner: Mijiritskii, Andrei · Inventors: Kuijper, Maarten; Mijiritskii, Andrei; Van Rompaey, Bart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a drive for accessing an optical record carrier (2) comprising means (4) for determining the type of record carrier in particular for distinguishing a read-only record carrier from a recordable or rewritable record carrier having a wobbled groove in the lead-in zone said , means comprising: a DPD measuring unit (41) for measuring the differential phase detection (DPD) signal, a PP measuring unit (42) for measuring the pushpull (PP) signal in case no DPD signal could be measured a wobble locking , unit (43) for locking in case a PP signal could be measured, to the wobble embedded in said wobbled groove using a first and/or a second polarity setting, and …
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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 August 5, 2005 and granted December 10, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 5, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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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.