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. 18, 1981
Filed:
Sep. 10, 1979
Applicant:
Inventors:
Ryozi Higashi, Tokorozawa, JP;
Hiroyuki Hirano, Tokorozawa, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H03H / ;
U.S. Cl.
CPC ...
333 / ; 179 / ; 330109 ; 330126 ;
Abstract
A tone control device for an audio equipment comprises a first mixer amplifier, at least one second mixer, a third mixer and at least one band rejection filter, which are operatively engaged with each other such that a center frequency, Q value and gain thereof can be independently controlled.