Static optical storage device
CA 2091107 C · Owner: Sayeed, Kabeer Ahmed · Inventors: Sayeed, Kabeer Ahmed
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Devices for optical storage of information consist of an optical storage medium, and an optical device, generally known as a head to read information from or write information onto the medium. In order to read from or write information onto the various points on the surface of the medium there usually is relative motion between the head and the surface of the storage medium. This is usually accomplished by moving the head, the surface or both in such a manner as to bring the desired points of the surface to the immediate neighbourhood of the head so that the head may read information from or write information to these points. It is most common to have the storage medium in the form of a …
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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 March 5, 1993 and granted May 14, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 2015.
- 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.