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经营范围
发明名称
Kohlemikrophon.
摘要
申请公布号
CH202983(A)
申请公布日期
1939.02.15
申请号
CHD202983
申请日期
1938.02.14
申请人
NEUE TELEFONGESELLSCHAFT MIT BESCHRAENKTER HAFTUNG
发明人
HAFTUNG NEUE TELEFONGESELLSCHAFT MIT BESCHRAENKTER
分类号
H04R21/02
主分类号
H04R21/02
代理机构
代理人
主权项
地址
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