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发明名称
Elektrisch leitender Stoff in Pulver- oder Griessform als Mikrofonfuellung fuer Fernsprechmikrofone
摘要
申请公布号
DE1041536(B)
申请公布日期
1958.10.23
申请号
DE1952S026982
申请日期
1952.01.30
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
DIPL.-ING. DR. RER. NAT. ERICH HUNGERMANN
分类号
H04R21/00
主分类号
H04R21/00
代理机构
代理人
主权项
地址
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