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经营范围
发明名称
Daempfungsvorrichtung fuer akustische Geraete
摘要
申请公布号
DE595821(C)
申请公布日期
1934.04.21
申请号
DE1928M106263D
申请日期
1928.08.29
申请人
MARCONI'S WIRELESS TELEGRAPH COMPANY LTD.
发明人
分类号
H04R1/16
主分类号
H04R1/16
代理机构
代理人
主权项
地址
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