发明名称 |
Using defect read from a disk to represent a machine-readable code |
摘要 |
A 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. |
申请公布号 |
US5805549(A) |
申请公布日期 |
1998.09.08 |
申请号 |
US19960626359 |
申请日期 |
1996.04.02 |
申请人 |
SONY CORPORATION;DIGITAL AUDIO DISC CORPORATION |
发明人 |
FITE, BARRY A.;MITCHELL, MICHAEL L.;KUNZ, RUSS A.;BRANNON, CLIFFORD R. |
分类号 |
G06F1/00;G06F21/00;G06K1/12;G06K19/14;G11B7/0037;G11B7/005;G11B7/24;G11B7/26;G11B20/00;G11B23/28;G11B23/36;G11B23/38;G11B27/10;G11B27/24;(IPC1-7):G11B27/19 |
主分类号 |
G06F1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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