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:
May. 24, 2005
Filed:
Nov. 27, 2000
Applicants:
Toshihiro Sugaya, Kitasoma-gun, JP;
Hiroshi Hasegawa, Yokosuka, JP;
Inventors:
Toshihiro Sugaya, Kitasoma-gun, JP;
Hiroshi Hasegawa, Yokosuka, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
B11B007/24 ;
U.S. Cl.
CPC ...
Abstract
A disk-shaped information recording medium has spiral tracks in which land- and groove-shaped tracks are alternately switched in units of rounds, and one index header which is aligned in the radial direction of a disk and is allocated at only the boundary between the land- and groove-shaped tracks.