Perfectionnement à l'acoustique des machines parlantes,申请号FRD790599-传众专利搜索

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发明名称	Perfectionnement à l'acoustique des machines parlantes
摘要
申请公布号	FR790599(A)	申请公布日期	1935.11.23
申请号	FRD790599	申请日期	1935.05.28
申请人	P. A. ZAHLEN	发明人
分类号	H04R1/34	主分类号	H04R1/34
代理机构		代理人
主权项
地址

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