Loud-speaker system,申请号US19520308256-传众专利搜索

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法人/股东/高管

发明名称	Loud-speaker system
摘要
申请公布号	US2787332(A)	申请公布日期	1957.04.02
申请号	US19520308256	申请日期	1952.09.06
申请人	FULMER NORMAN C	发明人	FULMER NORMAN C.
分类号	H04R1/28	主分类号	H04R1/28
代理机构		代理人
主权项
地址

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