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发明名称
Document Copying Deterrent Method
摘要
申请公布号
CA2136166(A1)
申请公布日期
1995.06.21
申请号
CA19942136166
申请日期
1994.11.18
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
BRASSIL, JOHN T.;LOW, STEVEN H.;MAXEMCHUK, NICHOLAS F.;O'GORMAN, LAWRENCE P.
分类号
H04N1/00;G03G21/04;G07D7/00;G07D7/20;G07F7/12;G09C1/00;G09C5/00;H04N1/32;H04N1/387;H04N1/40;H04N1/44;(IPC1-7):G06K1/12
主分类号
H04N1/00
代理机构
代理人
主权项
地址
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