Frequency response display for use with a graphic equalizer
CA 1204159 A · Owner: Sony Corporation · Inventors: Shibata, Takashi; Miyata, Toshihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An indicator and display for use with a graphic equalizer which receives an audio signal and includes first and second band pass filters which receive the audio signal and pass different pass bands, first and second variable resistors which have control shafts and knobs connected thereto with illumination means mounted in the knobs first, and second rectifiers connected to the output of the band pass filters, and first and second drive circuits connected to the outputs of the first and second rectifiers and the drive circuits connected to the illuminating means in the knobs and an oscillator switching circuit connected to the illumination means so as to cause the illumination means to flash …
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
- Granted May 6, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 6, 2003.
- 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.