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发明名称
EARPLUG AND HEARING AID USING THIS
摘要
申请公布号
JPH0837697(A)
申请公布日期
1996.02.06
申请号
JP19940191815
申请日期
1994.07.22
申请人
RION CO LTD
发明人
NARISAWA YOSHIYUKI
分类号
H04R1/10;H04R25/00;(IPC1-7):H04R25/00
主分类号
H04R1/10
代理机构
代理人
主权项
地址
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