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发明名称
IN-BAND RINGER SYSTEM
摘要
申请公布号
JPH0394526(A)
申请公布日期
1991.04.19
申请号
JP19890231952
申请日期
1989.09.06
申请人
NEC CORP
发明人
NAKAMURA OSAMU
分类号
H04B3/06;H04B3/10
主分类号
H04B3/06
代理机构
代理人
主权项
地址
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