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:
Mar. 03, 1987
Filed:
Sep. 13, 1985
Applicant:
Inventors:
Yoshikatsu Takeoka, Kawasaki, JP;
Nobuaki Yasuda, Zushi, JP;
Assignee:
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
3461351 ; 346 / ; 365113 ; 365126 ; 369284 ; 430945 ;
Abstract
A disk-shaped optical type recording medium is disclosed which includes a transparent substrate and recording layer formed on the substrate. The recording layer in a single layer, which is made of a material capable of absorbing energy reaching it through the substrate and being locally raised on one surface according to the absorbed heat energy of the laser beam.