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经营范围
发明名称
Elektroakustischer Apparat
摘要
申请公布号
DE586456(C)
申请公布日期
1933.10.21
申请号
DE1932S105885D
申请日期
1932.08.20
申请人
SIEMENS & HALSKE AKT.-GES.
发明人
HARTMANN DR. CARL A.;JACOBY HANS;JUNG GERHARD
分类号
H04R1/22
主分类号
H04R1/22
代理机构
代理人
主权项
地址
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