Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2000-08-03
2009-02-03
Vu, Kim Yen (Department: 2135)
Cryptography
Video cryptography
Copy protection or prevention
C380S200000, C380S203000, C713S193000, C369S288000, C369S291100, C726S026000, C726S032000, C726S033000
Reexamination Certificate
active
07486790
ABSTRACT:
A method and apparatus for controlling access to a storage medium, such as an optically readable medium. Light sensitive or other materials that are adapted to change state and affect reading of a storage medium are used to control access to data that may be stored on optical medium and/or to control use of the medium.
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patent
Drew Jeffrey M.
Goyette Donald Roland
Selinfreund Richard H.
Vig Rakesh
Dada Beemnet W
Kelley Drye & Warren LLP
Verification Technologies, Inc.
Vu Kim Yen
LandOfFree
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