Device for producing off-center necked ends on spun tubing,申请号US19560619260-传众专利搜索

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发明名称	Device for producing off-center necked ends on spun tubing
摘要
申请公布号	US2933123(A)	申请公布日期	1960.04.19
申请号	US19560619260	申请日期	1956.10.30
申请人	CALUMET & HECLA, INC.	发明人	GREENE RAYMOND H.;KOONS WILLIAM A.
分类号	B21D41/04	主分类号	B21D41/04
代理机构		代理人
主权项
地址

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