Method of producing welding projections on opening keys,申请号US19550492981-传众专利搜索

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发明名称	Method of producing welding projections on opening keys
摘要
申请公布号	US2760263(A)	申请公布日期	1956.08.28
申请号	US19550492981	申请日期	1955.03.08
申请人	AMERICAN CAN COMPANY	发明人	GEERTSEN NELSON
分类号	B21F45/00	主分类号	B21F45/00
代理机构		代理人
主权项
地址

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