Record carrier, playback device and method of recording information
CA 2326174 C · Owner: Linnartz, Johan, P. M. G. · Inventors: Talstra, Johan C.; Spruit, Johannes, H. M.; Linnartz, Johan, P. M. G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A record carrier has substantially parallel tracks which exhibit first , variations of a first physical parameter and second variations of a second physical parameter of the track. The first variations represent information recorded on the record carrier, which information is recoverable by means of a controllable type of data processing. A modulation pattern of the second variations represents a code for controlling said type of data processing. In respect of a code track that comprises the modulation pattern the modulation , pattern in the left neighbouring track (41 44) is aligned to the modulation , pattern in the right neighbouring track (43 46). Thereby crosstalk due to the , …
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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 January 10, 2000 and granted June 14, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 10, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 2022.
- 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.