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经营范围
发明名称
Fernsprechschaltung mit Lautsprechern.
摘要
申请公布号
CH266245(A)
申请公布日期
1950.01.15
申请号
CHD266245
申请日期
1947.12.12
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
GLOEILAMPENFABRIEKEN N. V. PHILIPS'
分类号
H04M9/08;H04R3/08
主分类号
H04M9/08
代理机构
代理人
主权项
地址
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