Sound record film and film printing apparatus,申请号US19270193017-传众专利搜索

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发明名称	Sound record film and film printing apparatus
摘要
申请公布号	US1904449(A)	申请公布日期	1933.04.18
申请号	US19270193017	申请日期	1927.05.20
申请人	GENERAL ELECTRIC COMPANY	发明人	HARDY ARTHUR C.
分类号	G11B7/28	主分类号	G11B7/28
代理机构		代理人
主权项
地址

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