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发明名称
MICROPHONE CAPABLE OF CONTROLLING DIRECTIVITY ELECTRICALLY
摘要
申请公布号
JPH0346498(A)
申请公布日期
1991.02.27
申请号
JP19890180602
申请日期
1989.07.14
申请人
NEC CORP
发明人
KAWAKUBO SATOSHI
分类号
H04R1/32
主分类号
H04R1/32
代理机构
代理人
主权项
地址
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