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发明名称
ACOUSTIC ELECTROMAGNETIC TRANSDUCER DEVICE HAVING MEANS FOR PROTECTING COIL-WIRE INSULATION
摘要
申请公布号
US3491215(A)
申请公布日期
1970.01.20
申请号
USD3491215
申请日期
1967.03.14
申请人
SONOTONE CORP.
发明人
LUCIAN BERCOVICI
分类号
H04R11/00;(IPC1-7):H04R13/02
主分类号
H04R11/00
代理机构
代理人
主权项
地址
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