| Title of Invention | OPTICAL RECORDING MEDIUM |
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| Abstract | A method and apparatus for preventing copying of data from optical storage media. A locus on optical storage medium is initially read to produce a signal and is then re-read by a reader to produce a second signal. The signal detected upon re-reading is different from the signal that is detected upon initial sampling. 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 Number | 251309 | |||||||||||||||
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| Indian Patent Application Number | 1256/DELNP/2004 | |||||||||||||||
| PG Journal Number | 10/2012 | |||||||||||||||
| Publication Date | 09-Mar-2012 | |||||||||||||||
| Grant Date | 05-Mar-2012 | |||||||||||||||
| Date of Filing | 11-May-2004 | |||||||||||||||
| Name of Patentee | VERIFICATION TECHNOLOGIES INC | |||||||||||||||
| Applicant Address | 85 WESTBROOK ROAD, CENTERBROOK, CT 06409, USA. | |||||||||||||||
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| PCT International Classification Number | G11B20/00 | |||||||||||||||
| PCT International Application Number | PCT/US01/10256 | |||||||||||||||
| PCT International Filing date | 2001-03-30 | |||||||||||||||
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