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:
Feb. 13, 1990
Filed:
Apr. 22, 1988
Shuzo Hitotsumachi, Kyoto, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A recording and reproducing apparatus includes three groups of magnetic heads. A sound signal is converted into a corresponding frequency-modulated signal and is also converted into a corresponding digital signal. The frequency-modulated sound signal is recorded into and reproduced from a magnetic tape via the first group of magnetic heads. The digital sound signal is converted into a corresponding quadrature phase shift keying signal. The quadrature phase shift keying sound signal is recorded into and reproduced from the magnetic tape via the second group of magnetic heads. A video signal is recorded into and reproduced from the magnetic tape via the third group of magnetic heads.