Timing device for talking motion pictures and the like,申请号US19230671995-传众专利搜索

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发明名称	Timing device for talking motion pictures and the like
摘要
申请公布号	US1833015(A)	申请公布日期	1931.11.24
申请号	US19230671995	申请日期	1923.10.31
申请人	BATTEY BRYAN M	发明人	BATTEY BRYAN M.
分类号	G03B21/50;G03B31/04	主分类号	G03B21/50
代理机构		代理人
主权项
地址

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