Method and means for making automatic change over in moving picture apparatus,申请号US19320640101-传众专利搜索

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发明名称	Method and means for making automatic change over in moving picture apparatus
摘要
申请公布号	US1972904(A)	申请公布日期	1934.09.11
申请号	US19320640101	申请日期	1932.10.28
申请人	ALF PRITCHARD	发明人	PRITCHARD ALF
分类号	G03B21/34;G03B21/36	主分类号	G03B21/34
代理机构		代理人
主权项
地址

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