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:
Nov. 04, 2014
Filed:
Jan. 22, 2013
Pioneer Corporation, Kanagawa, JP;
Memory-tech Holdings Inc., Tokyo, JP;
Masayoshi Yoshida, Kanagawa, JP;
Takuya Shiroto, Kanagawa, JP;
Hideki Kobayashi, Kanagawa, JP;
Masakazu Ogasawara, Kanagawa, JP;
Takao Tagiri, Kanagawa, JP;
Makoto Suzuki, Tokyo, JP;
Pioneer Corporation, Kanagawa, JP;
Memory-Tech Holdings Inc., Tokyo, JP;
Abstract
A recording medium is provided with: a guide layer on which a guide track or tracks are formed; and a plurality of recording layers, wherein a same mark group is formed in a same rotational phase position of each of a plurality of guide tracks which are included in a beam spot of guide laser light, the mark group including a pair of record marks which are shifted by a predetermined distance toward a right side and a left side, respectively, from a track center.