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经营范围
发明名称
Amplificateur téléphonique
摘要
申请公布号
FR1252089(A)
申请公布日期
1961.01.27
申请号
FR19590812923
申请日期
1959.12.12
申请人
发明人
RIDEAU JEAN
分类号
H04M1/62
主分类号
H04M1/62
代理机构
代理人
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地址
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