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发明名称
HOWLING PREVENTION STRUCTURE FOR EAR-PHONE TYPE TRANSMITTER AND RECEIVER
摘要
申请公布号
JPH02108400(A)
申请公布日期
1990.04.20
申请号
JP19880262301
申请日期
1988.10.18
申请人
SEIKO EPSON CORP
发明人
OTO HIDETOSHI
分类号
H04R1/00
主分类号
H04R1/00
代理机构
代理人
主权项
地址
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