Spring group,申请号US19440542793-传众专利搜索

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发明名称	Spring group
摘要
申请公布号	US2483375(A)	申请公布日期	1949.09.27
申请号	US19440542793	申请日期	1944.06.29
申请人	AMERICAN STEEL FOUNDRIES	发明人	TACK CARL E.
分类号	B61F5/12	主分类号	B61F5/12
代理机构		代理人
主权项
地址

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