Metal working method,申请号US19500138274-传众专利搜索

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发明名称	Metal working method
摘要
申请公布号	US2717221(A)	申请公布日期	1955.09.06
申请号	US19500138274	申请日期	1950.01.12
申请人	CHRISTNER ROBERT M	发明人	CHRISTNER ROBERT M.
分类号		主分类号
代理机构		代理人
主权项
地址

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