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发明名称
RINGING ELIMINATING DEVICE
摘要
申请公布号
JPH01276880(A)
申请公布日期
1989.11.07
申请号
JP19880103910
申请日期
1988.04.28
申请人
HITACHI LTD
发明人
KAGEYAMA MASAHIRO;ACHIHA MASAHIKO
分类号
H04N5/21;H03H17/00;H03H17/02;H03H21/00
主分类号
H04N5/21
代理机构
代理人
主权项
地址
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