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:
Oct. 08, 1991
Filed:
Nov. 21, 1990
Applicant:
Inventor:
Satoru Hayashi, Shizuoka, JP;
Assignee:
Kabushiki Kaisha Kawai Gakki Seisakusho, Shizuoka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04H / ;
U.S. Cl.
CPC ...
381 11 ; 381-1 ; 381 25 ;
Abstract
An output circuit of a stereo type audio device includes a switch state detection switch which responds to an open state of a normally closed internal switch of an output jack of a first channel to separate a stereo signal source from the first and a second channels of the stereo device and connect a monoral signal source to the second channel.