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发明名称
Dispositif électro-acoustique
摘要
申请公布号
FR1083676(A)
申请公布日期
1955.01.11
申请号
FRD1083676
申请日期
1953.07.01
申请人
AMERICAN-DANISH OTICON CORP.
发明人
分类号
H04R7/14;H04R11/06;H04R25/04;H04R31/00
主分类号
H04R7/14
代理机构
代理人
主权项
地址
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