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. 13, 2010
Filed:
Nov. 27, 2006
Koji Mishima, Tokyo, JP;
Takashi Kikukawa, Tokyo, JP;
Hidetake Itoh, Tokyo, JP;
Daisuke Yoshitoku, Tokyo, JP;
Koji Mishima, Tokyo, JP;
Takashi Kikukawa, Tokyo, JP;
Hidetake Itoh, Tokyo, JP;
Daisuke Yoshitoku, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A multilayer optical recording medium enabled to retain an ideal signal regenerating property in spite of accidental adhesion of finger mark or alien substance is provided. The multilayer optical recording mediumis provided with a plurality of information-recording layers, andcapable of reading information with a reading light irradiated through a light incidence surfaceA on one side and is so adapted that the light incidence side information-recording layerapproximating most closely to the light incidence surfaceA may be set at a small recording capacity as compared with the recording capacities of at least one of the other information-recording layers.