Sound reproducing apparatus,申请号US19550510271-传众专利搜索

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法人/股东/高管

发明名称	Sound reproducing apparatus
摘要
申请公布号	US2978543(A)	申请公布日期	1961.04.04
申请号	US19550510271	申请日期	1955.05.23
申请人	KENNEDY DAVID F	发明人	KENNEDY DAVID F.
分类号	H04R1/10;H04S5/00	主分类号	H04R1/10
代理机构		代理人
主权项
地址

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