Testing device,申请号US19440526175-传众专利搜索

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发明名称	Testing device
摘要
申请公布号	US2381634(A)	申请公布日期	1945.08.07
申请号	US19440526175	申请日期	1944.03.13
申请人	HELIX GAGE WORKS	发明人	BACK FRANZ G.
分类号	G02B21/00	主分类号	G02B21/00
代理机构		代理人
主权项
地址

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