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经营范围
发明名称
TONE VOLUME CONTROLLER FOR HEARING AID
摘要
申请公布号
JPH04242400(A)
申请公布日期
1992.08.31
申请号
JP19910003677
申请日期
1991.01.17
申请人
SONY CORP
发明人
MIURA MASAMI
分类号
H04R25/00
主分类号
H04R25/00
代理机构
代理人
主权项
地址
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