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. 05, 2013
Filed:
Dec. 17, 2010
Hiroshi Kayama, Osaka, JP;
Kazuo Momoo, Osaka, JP;
Hiroshi Kayama, Osaka, JP;
Kazuo Momoo, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An optical drive according to the present invention can write information on an optical disc, which includes a substrate on which a number of pre-pits () have been formed on its tracks (tto t) and a recording film that is supported on the substrate. The optical drive includes an optical pickup, and a writing control section for controlling the optical pickup so that marks () are recorded on the tracks (tto t) so as to overlap with some of the pre-pits () and for making the optical pickup irradiate the recording film with a writing light beam. The recorded marks () overlap with at least ten of the pre-pits ().