Phonograph,申请号US19260115150-传众专利搜索

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发明名称	Phonograph
摘要
申请公布号	US1813972(A)	申请公布日期	1931.07.14
申请号	US19260115150	申请日期	1926.06.11
申请人	THOMAS ADOLPH A	发明人	THOMAS ADOLPH A.
分类号	H04R7/14	主分类号	H04R7/14
代理机构		代理人
主权项
地址

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