Method for making precoiled helical fins,申请号US19470734960-传众专利搜索

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发明名称	Method for making precoiled helical fins
摘要
申请公布号	US2482241(A)	申请公布日期	1949.09.20
申请号	US19470734960	申请日期	1947.03.15
申请人	THE GRISCOM-RUSSELL COMPANY	发明人	BRUEGGER ERNEST
分类号	B21C37/26	主分类号	B21C37/26
代理机构		代理人
主权项
地址

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