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. 24, 1978
Filed:
Nov. 26, 1975
Applicant:
Inventor:
Yoshihisa Kamo, Kawasaki, JA;
Assignee:
Nippon Columbia Kabushikikaisha, Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
1791 / ; 179 / ; 1791 / ; 1791 / ; 1791 / ;
Abstract
A multi-directional stereo multiple recording and reproducing apparatus is disclosed in which a plurality of sound source signals are encoded to a plurality of main- and sub-channel signals, the encoded main-channel signals and a carrier signal of a frequency f.sub.c which is angle-modulated with the sub-channel signals are mixed through a filter circuit, and the modulated signal is recorded on a lacquer master disc by a constant acceleration cutting and then reproduced therefrom.