Cone speaker,申请号US19260153972-传众专利搜索

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发明名称	Cone speaker
摘要
申请公布号	US1745599(A)	申请公布日期	1930.02.04
申请号	US19260153972	申请日期	1926.12.10
申请人	BRANDES LABORATORIES, INC.	发明人	BROWN RALPH L.
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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