PHONO-FILM RECORDING AND REPRODUCING METHOD,申请号CAD324378-传众专利搜索

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发明名称	PHONO-FILM RECORDING AND REPRODUCING METHOD
摘要
申请公布号	CA324378(A)	申请公布日期	1932.07.19
申请号	CAD324378	申请日期
申请人	THE RADIO CORPORATION OF AMERICA	发明人	AUGUST KAROLUS
分类号		主分类号
代理机构		代理人
主权项
地址

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