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:
Jan. 27, 1981
Filed:
Apr. 12, 1979
Applicant:
Inventor:
Satoshi Takahashi, Toyonaka, JP;
Assignee:
Onkyo Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 66 ; 360 25 ;
Abstract
A circuitry has a calibration signal generator, a higher frequency range output level adjusting circuit and a recording bias current adjusting variable resistor. The signal generator continually alternately gives output two kinds of calibration signals of lower and higher frequencies. The higher range adjusting circuit is operatively connected with the variable resistor, and adjusts output sound level, as indicated at an indicator, only of the higher frequency signal of the two calibration signals.