Optical disc apparatus
CA 2031565 C · Owner: Shinada, Akira · Inventors: Shinada, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical disc apparatus includes an optical pickup for reading recorded information on an optical disc a servo, controller for performing tracking servo control and/or focus servo control of the optical pickup in response to an output signal from the optical pickup, a vibration detector for detecting a vibration occurred to the body of the apparatus, and control means for performing up and down control of a servo gain for the tracking servo and/or the focus servo of the optical pickup in response to an output signal from the vibration detector.
Read the whole patent
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 December 5, 1990 and granted July 20, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 5, 2012.
- 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.