Safety switch for motion picture projecting machines,申请号US19280286377-传众专利搜索

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发明名称	Safety switch for motion picture projecting machines
摘要
申请公布号	US1847075(A)	申请公布日期	1932.03.01
申请号	US19280286377	申请日期	1928.06.18
申请人	SENTRY SAFETY CONTROL CORPORATION	发明人	ALLEN THOMAS TWADDEL;GIBBS CHARLES KENNETH
分类号	G03B21/18	主分类号	G03B21/18
代理机构		代理人
主权项
地址

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