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发明名称
ELECTROACOUSTIC TRANSDUCER
摘要
申请公布号
JPH0252598(A)
申请公布日期
1990.02.22
申请号
JP19880204083
申请日期
1988.08.16
申请人
NEC CORP
发明人
KAMEYAMA AKIRA;SASAKI TAKASHI
分类号
H04R1/44;H04R1/40;H04R17/00
主分类号
H04R1/44
代理机构
代理人
主权项
地址
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