Photo-electric measuring apparatus,申请号US19310556579-传众专利搜索

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发明名称	Photo-electric measuring apparatus
摘要
申请公布号	US1954925(A)	申请公布日期	1934.04.17
申请号	US19310556579	申请日期	1931.08.12
申请人	EXTON WILLIAM G	发明人	EXTON WILLIAM G.
分类号	G01N21/25	主分类号	G01N21/25
代理机构		代理人
主权项
地址

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