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发明名称
KEY EXTENSION SYSTEM
摘要
申请公布号
JPH03106291(A)
申请公布日期
1991.05.02
申请号
JP19890243856
申请日期
1989.09.20
申请人
TOSHIBA CORP
发明人
NAKAMURA MASUICHI
分类号
G06F3/02;G06F3/023;H03M11/04;H03M11/22;H04M1/00;H04Q3/58
主分类号
G06F3/02
代理机构
代理人
主权项
地址
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