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发明名称
Dispositif permettant d'obtenir une conversation téléphonique claire dans une enceinte bruyante ou une atmosphère agitée
摘要
申请公布号
FR816808(A)
申请公布日期
1937.08.18
申请号
FRD816808
申请日期
1936.04.21
申请人
SOCIETE DES TELEPHONES ERICSSON
发明人
分类号
H04M1/19
主分类号
H04M1/19
代理机构
代理人
主权项
地址
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