CD-ROM with machine-readable I.D. code
October 6, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod for controlling access to recorded data Identification card and a method of producing same Identification card with a visible authenticity feature and a method of manufacturing said card Compact disc player capable of playing plural selections recorded on a compact disc in a preselected sequence Security level identification method for computer based information Method for affixing information on read-only optical discs Patent #: 4961077 InventorsAssigneeApplicationNo. 132709 filed on 10/06/1993US Classes:369/275.5, Protection (e.g., preventing damage to medium, etc.)347/264, With record receiver or handling means therefor369/52.1, CONTROL STRUCTURE ON STORAGE MEDIUM SENSED BY OTHER THAN TRANSDUCER SUPPORT (E.G., CONDUCTIVE STRIP, NOTCHED EDGE SENSOR)369/53.21, For protection369/283, Layered (e.g., permanent protective layer)369/286, Laminated or unified discrete layers369/292MISCELLANEOUSExaminersPrimary: LaRoche, Eugene R.Assistant: Nguyen, Tan T. Attorney, Agent or FirmForeign Patent References
International ClassesG11B 023/30G11B 023/38 AbstractA machine-readable serial number is formed on a CD-ROM by using a laser to selectively remove a reflective layer from the CD-ROM. Removal of the reflective layer creates defects in addressable information storage locations on the CD-ROM. The serial number is read by detecting the defects. The serial number is used in a software distribution system in which many different software programs are distributed on a single CD-ROM and an access code based on the desired software program and the serial number of a particular CD-ROM is used to "unlock" the desired program on the particular CD-ROM. | |
