Safety unit for motion picture projectors,申请号US19270221491-传众专利搜索

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发明名称	Safety unit for motion picture projectors
摘要
申请公布号	US1809817(A)	申请公布日期	1931.06.16
申请号	US19270221491	申请日期	1927.09.23
申请人	SENTRY SAFETY CONTROL CORPORATION	发明人	ALLEN THOMAS T.;ADAMS JOHN FRANCIS
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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