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经营范围
发明名称
CALLING SIGNAL SYSTEM
摘要
申请公布号
JPS52122020(A)
申请公布日期
1977.10.13
申请号
JP19760038388
申请日期
1976.04.06
申请人
NIPPON ELECTRIC CO
发明人
SHIMIZU SHIGERU
分类号
H04M3/02
主分类号
H04M3/02
代理机构
代理人
主权项
地址
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