Optically-readable disk with copy protection device

Dynamic information storage or retrieval – Storage medium structure – Layered

Reexamination Certificate

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Details

C369S275500, C369S030050, C369S030190, C369S047120, C720S719000

Reexamination Certificate

active

07916619

ABSTRACT:
An optically-readable disk includes a device that disrupts readability of the disk when the disk is spun at an angular velocity substantially greater than required to play the disk in its intended playing device, or for when a defined integral of velocity and time is exceeded. The device may include a fluid container that disperses a data-disruptive fluid. The device may include a membrane or layer that is disrupted when the disk is rotated above a defined angular velocity, or when a defined integral of velocity and time is exceeded.

REFERENCES:
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patent: 5832088 (1998-11-01), Nakajima et al.
patent: 6266299 (2001-07-01), Oshima et al.
patent: 6597648 (2003-07-01), Yeo et al.
patent: 7039927 (2006-05-01), Constantinou et al.
patent: 2001/0046204 (2001-11-01), Rollhaus et al.
patent: 2003/0149885 (2003-08-01), Fang et al.
patent: 2003/0179663 (2003-09-01), Tomita
patent: 2003/0185128 (2003-10-01), Shoji et al.
patent: 2005/0169145 (2005-08-01), Yumiba et al.
patent: 2006/0268661 (2006-11-01), Ferren et al.
patent: 8-55342 (1996-02-01), None

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