Method of making tapered tubes,申请号US19440549229-传众专利搜索

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发明名称	Method of making tapered tubes
摘要
申请公布号	US2418312(A)	申请公布日期	1947.04.01
申请号	US19440549229	申请日期	1944.08.12
申请人	NATHAN MICHELMAN	发明人	MICHELMAN NATHAN
分类号	B21C37/18	主分类号	B21C37/18
代理机构		代理人
主权项
地址

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