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经营范围
发明名称
OPTICAL MICROPHONE
摘要
申请公布号
JPH02190099(A)
申请公布日期
1990.07.26
申请号
JP19890010578
申请日期
1989.01.18
申请人
NEC CORP
发明人
SUEYASU TOSHIJI
分类号
H04R23/00
主分类号
H04R23/00
代理机构
代理人
主权项
地址
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