Sound concentrating and directing horn attachment for loudspeakers,申请号US07/639180-传众专利搜索

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发明名称	Sound concentrating and directing horn attachment for loudspeakers
摘要
申请公布号	USD338466(S1)	申请公布日期	1993.08.17
申请号	US07/639180	申请日期	1991.01.09
申请人		发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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