The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 1984
Filed:
Jul. 09, 1981
Akio Kaneko, Iwaki, JP;
Hitoshi Kajiwara, Iwaki, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
An equalizer apparatus for audio equipment capable of selecting between a 2-speaker system and a 4-speaker system, including a display device indicating proper operation of the control knobs of the equalizer. The display device includes a first illuminable element of a first color for indicating operation of one channel of stereophonic sound reproduction, a second illuminable element of a second color for indicating operation of the other channel of stereophonically reproduced sound, and color coded means corresponding to said first and second colors for indicating which of the control knobs produce data signals for the first channel and which of the control knobs produce data signals for the second channel. Further, the color coded means may indicate which of the control knobs produce data signals for each of the divided frequencies of the respective channels during operation of the audio equipment in the manner simulating quadriphonic sound.