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. 19, 1982
Filed:
Jul. 17, 1979
Tsunao Hasegawa, Tokorozawa, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A device for adjusting the frequency response characteristic of a magnetic sound recorder at relatively low and high frequencies, wherein the signal level of the recording signal to be supplied to the recording head of the recorder and the amount of compensation for the frequency response characteristic of the recording signal are adjusted by visual observation of a visible signal produced by one of electrically actuated light-emissive semiconductor elements which are to be selectively energized depending upon the relationship between the signal level of the playback signal and a reference signal which may be one of a plurality of predetermined reference signals or may be variable with the level of the recording signal.