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发明名称
Microphone perfectionné et ses applications, notamment aux appareils capteurs et reproducteurs de sons pour véhicules et autres usages
摘要
申请公布号
FR775927(A)
申请公布日期
1935.01.12
申请号
FRD775927
申请日期
1933.10.07
申请人
发明人
BRETTMON JACQUES
分类号
H04R21/02
主分类号
H04R21/02
代理机构
代理人
主权项
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