Optical disk having read-exclusive and write-enable regions

Details Optical disk having read-exclusive and write-enable regions Optical disk having read-exclusive and write-enable regions

1990-02-07

1993-05-25

Chin, Tommy P.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 50, 369133, 369240, 369100, G11B 1722

Patent

active

052146278

ABSTRACT:
An optical disk provided with read-exclusive regions where previously recorded information can be read, and with write-enable regions where information can be written. Information not desired to be rewritten can be recorded on the read-exclusive regions. The write-enable regions are open to users to freely add information thereto and to re-write information recorded. This optical disk can thus be used in various fields.

REFERENCES:
patent: 4546461 (1985-10-01), Isobe
patent: 4789979 (1988-12-01), Hiraoka et al.
patent: 4841515 (1989-06-01), James
patent: 4918677 (1990-04-01), Ashinuma et al.
patent: 4958314 (1990-09-01), Imai et al.
patent: 4975898 (1990-12-01), Yoshida
patent: 4998237 (1991-03-01), Osakabe et al.

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