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:
Oct. 19, 2010
Filed:
Apr. 26, 2007
Akira Mashimo, Tokorozawa, JP;
Akira Mashimo, Tokorozawa, JP;
TEAC Corporation, Tama-shi, Tokyo, JP;
Abstract
Recording of data into a multilayer optical disk and reliable reproduction of the data are enabled. When user data are recorded on a multilayer optical disk having a first layer Land a second layer L, the second layer Lis formatted beforehand, to thus record dummy data. Subsequently, the user data are recorded into the first layer L. Even after completion of recording of the user data at some point in the first layer L, an area of the second layer Llocated immediately above or below a recorded area of the first layer Lremains in a recorded state at all times. Compatibility with a play-only disk is maintained, and the play-only drive can reproduce the user data immediately after recording of the data.