Patent ID: 6839900
Filing Date: 2005-01-04
Classification: G11B,H04N

Abstract:
1. A disk cartridge having a disk and a case for housing said disk, said disk comprising: a center hole provided in a center thereof; a disk holder area which is annular and extends outwardly from said center hole; a transition area which is annular and extends outwardly from said disk holder area, said transition area not for use of recording information; and an information recording area which is annular and extends outwardly from said transition area, said information recording area for use of recording information, wherein: said information recording area comprises: said transition area and said first annular zone constitutes a third annular zone; and a disk cartridge identification information which is uniquely assigned to said disk is recorded in a portion of said third annular zone, and is provided to be visibly discernible from outside said case.