Comparator,申请号US19290415244-传众专利搜索

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发明名称	Comparator
摘要
申请公布号	US1859035(A)	申请公布日期	1932.05.17
申请号	US19290415244	申请日期	1929.12.19
申请人	HALL ARTHUR J	发明人	HALL ARTHUR J.
分类号	G01N21/86	主分类号	G01N21/86
代理机构		代理人
主权项
地址

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