Apparatus for optically recording and reproducing information
CA 2077950 C · Owner: Nippon Conlux Co. Ltd. · Inventors: Yamazaki, Koichi; Noda, Kazuo; Onodera, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for optically recording and reproducing information with high accuracy is provided which can deal with a change in the operating conditions of the signal processing systems. The apparatus having a light beam generator, an information signal processing system including an amplifier, and a servo control signal processing system including an amplifier for optically, recording and reproducing information to and from an optical information storage medium while reciprocally moving the storage medium back and forth and applying a light beam from the light beam generator to the storage medium, including: a holding circuit provided between the input and output terminals of each of the …
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 September 10, 1992 and granted May 20, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 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.