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经营范围
发明名称
Innerhalb eines Luftkissens angeordneter Telefonhoerer
摘要
申请公布号
DE556887(C)
申请公布日期
1932.08.16
申请号
DENDATF070088D
申请日期
申请人
GUSTAV HERMANN FISCH
发明人
分类号
H04R1/10
主分类号
H04R1/10
代理机构
代理人
主权项
地址
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