Circuit controller for motion picture films,申请号US19290408551-传众专利搜索

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发明名称	Circuit controller for motion picture films
摘要
申请公布号	US1869678(A)	申请公布日期	1932.08.02
申请号	US19290408551	申请日期	1929.11.20
申请人	AUTOMATIC PROJECTOR-OPERATOR INC.	发明人	FENNER HOWARD H.;SILVIS ROBERT E.
分类号	G03B21/32	主分类号	G03B21/32
代理机构		代理人
主权项
地址

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