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经营范围
发明名称
Electroacoustical device
摘要
申请公布号
US2921135(A)
申请公布日期
1960.01.12
申请号
US19580711315
申请日期
1958.01.27
申请人
ELECTRO-VOICE, INCORPORATED
发明人
HOODWIN LOUIS S.
分类号
H04R1/26
主分类号
H04R1/26
代理机构
代理人
主权项
地址
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