Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2005-12-06
2005-12-06
Dinh, Tan (Department: 2653)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C369S286000, C428S064400
Reexamination Certificate
active
06973021
ABSTRACT:
This invention provides an optical disk effective in both precision and productivity, and to a process for the manufacture thereof. The optical disk allows reading of the information recorded on each information-recording surface of the two or more information-recording surfaces by varying the focal position of a playback laser beam incident on and passing through said light transmitting substrate; and the optical disk is provided with a transparent layer that is laminated onto the light transmitting substrate and is constituted of a thermoplastic resin sheet of uniform thickness and the transparent layer has an information-recording surface other than the surface of said light transmitting substrate formed thereon.
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Japanese Patent Application No. JP 62135121 filed on May 29, 1987 for applicant Matsushita Electric Ind. Co., Ltd. in Japanese with English abstract, printed by GPI Web Client (6 pages).
Kondo Tetsuya
Nishizawa Akira
Anderson Kill & Olick PC
Dinh Tan
JVC Victor Co. of Japan
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