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:
Apr. 25, 1989
Filed:
Sep. 28, 1988
Applicant:
Inventor:
Yoshikazu Kobayashi, Kawasaki, JP;
Assignee:
Nippon Columbia Kabushikikaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; G11B / ;
U.S. Cl.
CPC ...
358342 ; 360 27 ; 369111 ;
Abstract
A recording disc on which a frequency modulated (FM) signal is recorded as pits or dots along a track formed as a concentric or spiral shape in such a manner that the pits or dots are arranged on a radial line during at least a predetermined interval.