Method of making castle nuts,申请号US19320646640-传众专利搜索

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发明名称	Method of making castle nuts
摘要
申请公布号	US2013460(A)	申请公布日期	1935.09.03
申请号	US19320646640	申请日期	1932.12.10
申请人	THE NATIONAL SCREW & MANUFACTURING COMPANY	发明人	ERDMAN HARVEY C.
分类号	B21K1/70	主分类号	B21K1/70
代理机构		代理人
主权项
地址

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