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发明名称
Method and apparatus for preventing the copying of a video program.
摘要
申请公布号
EP0256753(B1)
申请公布日期
1993.11.03
申请号
EP19870306898
申请日期
1987.08.04
申请人
MACROVISION CORPORATION
发明人
RYAN, JOHN O.
分类号
H04N5/91;G11B20/00;G11B27/024;G11B27/028;H04N5/913;(IPC1-7):G11B20/00
主分类号
H04N5/91
代理机构
代理人
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地址
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