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. 24, 2007
Filed:
Oct. 25, 2002
Takahiro Sato, Mino, JP;
Takashi Yumiba, Kyotanabe, JP;
Takahiro Nagai, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An optical disc recording method is provided for superimposing sub information by displacing edges of one or more optically-readable recording marks by a minute amount on the basis of a binary sequence code, when recording main information by forming said one or more recording marks, the optical disc recording method including a sequence generation step of generating a first binary sequence code and a second binary sequence code that is different from the first binary sequence code; a first displacement step of displacing one of the edges according to the first binary sequence code; and a second displacement step of displacing another of the edges according to the second binary sequence code.