Dynamic information storage or retrieval – Storage medium structure – Adjuncts or adapters
Patent
1993-01-21
1994-02-22
Levy, Stuart S.
Dynamic information storage or retrieval
Storage medium structure
Adjuncts or adapters
360135, 369291, G11B 726, G11B 370, G11B 584
Patent
active
052894568
ABSTRACT:
An optical disc equipped with a hub having a centering hole into which a spindle shaft of a disc driving mechanism is inserted, wherein a centering hole portion of the hub is provided with a centering hole reinforcing means made of a material excellent in abrasion resistance and smoothness or a member having a central hole is formed of a resin excellent in abrasion resistance and smoothness.
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patent: 4829510 (1989-05-01), Takahashi
patent: 4866697 (1989-09-01), Yamaguchi et al.
patent: 4982399 (1991-01-01), Odawara et al.
patent: 4983439 (1991-01-01), Saito
Letscher George J.
Levy Stuart S.
Shaw, Jr. Philip M.
Sony Corporation
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