Sound recording and reproducing system,申请号US19280321365-传众专利搜索

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发明名称	Sound recording and reproducing system
摘要
申请公布号	US1888724(A)	申请公布日期	1932.11.22
申请号	US19280321365	申请日期	1928.11.23
申请人	WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY	发明人	HANNA CLINTON R.
分类号	G11B7/00	主分类号	G11B7/00
代理机构		代理人
主权项
地址

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