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发明名称
Perfectionnement au microphone pour transmissions téléphoniques et autres applications
摘要
申请公布号
FR1057179(A)
申请公布日期
1954.03.05
申请号
FRD1057179
申请日期
1952.05.02
申请人
SOCIETE DES TELEPHONES ERICSSON
发明人
NHUNG TRINH VAN
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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