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:
Dec. 01, 1987
Filed:
Feb. 02, 1987
Applicant:
Inventors:
Katsuhiko Takano, Yokohama, JP;
Satoshi Yoshihara, Kawasaki, JP;
Shigeharu Iijima, Kawasaki, JP;
Eizo Sasamori, Yokohama, JP;
Masaaki Matsushima, Machida, JP;
Hiroyoshi Kishi, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; G01D / ;
U.S. Cl.
CPC ...
428192 ; 3461351 ; 346137 ; 428203 ; 428209 ; 428210 ; 428469 ; 428913 ; 430945 ;
Abstract
An optical recording medium comprises a plurality of layers including an optical recording layer laminated on the substrate, said substrate having a region on and around the edge portion thereof where no optical recording layer is formed, and said region being sealed by any of said layers other than said optical recording layer.