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经营范围
发明名称
INCOMING TONE GENERATING CIRCUIT
摘要
申请公布号
JPS642451(A)
申请公布日期
1989.01.06
申请号
JP19870156421
申请日期
1987.06.25
申请人
NIPPON TELEGR & TELEPH CORP <NTT>
发明人
SHIMIZU MAKOTO;IKEDA TSUTOMU;SHINOHARA OSAMU
分类号
H04M1/00
主分类号
H04M1/00
代理机构
代理人
主权项
地址
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