Composite sheet metal structure,申请号US19410385229-传众专利搜索

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发明名称	Composite sheet metal structure
摘要
申请公布号	US2423870(A)	申请公布日期	1947.07.15
申请号	US19410385229	申请日期	1941.03.26
申请人	RADIO CORPORATION OF AMERICA	发明人	BLESSING GREGORY W.
分类号	B21D49/00	主分类号	B21D49/00
代理机构		代理人
主权项
地址

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