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:
Jan. 07, 2003
Filed:
Jun. 30, 1999
Maho Kuwahara, Kawasaki, JP;
Shintaro Takehara, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An optical disk includes land and groove tracks which are alternately arranged, a land portion which is substantially flush with the land track and separates the groove track, a set of embossed pits which is formed in a boundary between the land portion and one of the land tracks located on two sides of the groove track in which the land portion is formed, and a record/reproduction interruption portion which is formed in a record area formed on the land track located on a side on which the embossed pits are not formed and adjacent to the land portion and on/from which no data is recorded/reproduced. Data are recorded/reproduced in units of ECC blocks each having a plurality of sectors.