Method of classification,申请号US19350044915-传众专利搜索

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发明名称	Method of classification
摘要
申请公布号	US2174553(A)	申请公布日期	1939.10.03
申请号	US19350044915	申请日期	1935.10.14
申请人	MINING PROCESS AND PATENT COMPANY	发明人	DAMAN ARTHUR C.
分类号	B03B5/02	主分类号	B03B5/02
代理机构		代理人
主权项
地址

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