Storage medium and apparatus and method for recovering information from such medium by oversampling
CA 2079673 C · Owner: Atherton, Mark Leighton · Inventors: Richards, Martin John; Seagrave, Charles Gordon; Mandell, Douglas Evan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates generally to a storage medium carrying symbols representing digital information the rec-, overy from a storage medium of symbols representing digital information and the determination of the digital information represented by such symbols. More particularly the invention relates to storage media carrying the symbols in two dimensions and to the recovery of such symbols by oversampling in two dimensions. While the invention has many applications, the invention is described in connection with preferred embodiments in which the symbols are carried by and recovered from an optical-storage medium namely, motion picture film, the symbols representing digital information into …
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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 4, 1992 and granted November 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 4, 2014.
- 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.