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发明名称
Einrichtung zur Tonwiedergabe von mehreren Sprechstromquellen
摘要
申请公布号
DE627557(C)
申请公布日期
1936.03.18
申请号
DED627557D
申请日期
1930.09.14
申请人
ROLF RAPP;ROLF RAPP
发明人
分类号
H04S3/00
主分类号
H04S3/00
代理机构
代理人
主权项
地址
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