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发明名称
SYSTEMS AND METHODS FOR PREVENTING UNAUTHORIZED USE OF DIGITAL CONTENT
摘要
Published without an
申请公布号
CA2435624(A1)
申请公布日期
2002.03.28
申请号
CA20012435624
申请日期
2001.09.21
申请人
ECD SYSTEMS, INC.
发明人
HOWARD, DANIEL G.;HART, JOHN J., III;LEVINE, RICHARD B.;LEE, ANDREW R.
分类号
G06F1/00;G06F21/00;(IPC1-7):G06F12/14
主分类号
G06F1/00
代理机构
代理人
主权项
地址
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