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. 25, 1986
Filed:
Jun. 14, 1985
Mitsuharu Sawamura, Yokohama, JP;
Susumu Ito, Tokyo, JP;
Masaaki Matsushima, Machida, JP;
Hiroyoshi Kishi, Tokyo, JP;
Eizo Sasamori, Yokohama, JP;
Satoshi Yoshihara, Kawasaki, JP;
Shigeharu Iijima, Kawasaki, JP;
Katsuhiko Takano, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A recording medium is provided which comprises (a) a first recording layer; (b) a second recording layer provided in contiguity to the first recording layer; and (c) a separation layer for spatially separating the first and second recording layer. The first recording layer has a sufficient film thickness not to permit the recording to be effected on the second recording layer, while the recording operation is performed on the first recording layer, and the recording operation is effected on the second recording layer at positions corresponding to defective portions in the first recording layer.