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发明名称
Vorrichtung zur Gespraechszeitbegrenzung, insbesondere fuer Muenzfernsprecher
摘要
申请公布号
DE600931(C)
申请公布日期
1934.08.06
申请号
DED600931D
申请日期
1930.08.14
申请人
DIPL.-ING. BERTHOLD FREUND
发明人
分类号
H04M17/02
主分类号
H04M17/02
代理机构
代理人
主权项
地址
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