Method of making spring covers,申请号US19300465959-传众专利搜索

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发明名称	Method of making spring covers
摘要
申请公布号	US1925713(A)	申请公布日期	1933.09.05
申请号	US19300465959	申请日期	1930.07.07
申请人	CRIST GEORGE W	发明人	CRIST GEORGE 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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