Auditory insert,申请号US19300494731-传众专利搜索

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发明名称	Auditory insert
摘要
申请公布号	US1852130(A)	申请公布日期	1932.04.05
申请号	US19300494731	申请日期	1930.11.10
申请人	SCHIER MAYER B A	发明人	SCHIER MAYER B. A.
分类号	H04R25/00	主分类号	H04R25/00
代理机构		代理人
主权项
地址

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