Disk read-out circuit
CA 2120509 C · Owner: Samsung Electronics Co. Ltd. · Inventors: Yoon, Jong-Yoon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A circuit for reading out data written on a disk filters respective frequencies of, data of different bands. The circuit has a filter unit (24) consisting of a plurality of, filters each corresponding to the frequency of a different band and a filter selection, controller (25) for controlling the frequency supplied to the filter unit (24) to thereby, filter with respect to the frequencies of different bands. Thus high density , data can be, written on the disk and filtering of the data is optimized so that the , signal quality of, the disk read-out circuit is enhanced.
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 November 30, 1992 and granted May 1, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 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.