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发明名称
Mikrophon fuer geraeuschvolle Umgebung
摘要
申请公布号
DE744615(C)
申请公布日期
1944.01.21
申请号
DE1942N045476D
申请日期
1942.03.05
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
VERMEULEN ROELOF
分类号
H04R1/38
主分类号
H04R1/38
代理机构
代理人
主权项
地址
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