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发明名称
Perfectionnements aux appareils téléphoniques
摘要
申请公布号
FR854285(A)
申请公布日期
1940.04.09
申请号
FRD854285
申请日期
1939.05.04
申请人
ASSOCIATED TELEPHONE & TELEGRAPH COMPANY
发明人
分类号
H04M1/03
主分类号
H04M1/03
代理机构
代理人
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地址
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