Method of making screws,申请号US19350050042-传众专利搜索

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发明名称	Method of making screws
摘要
申请公布号	US2084078(A)	申请公布日期	1937.06.15
申请号	US19350050042	申请日期	1935.11.15
申请人	AMERICAN SCREW COMPANY	发明人	CLARK EUGENE E.
分类号	B21K1/46	主分类号	B21K1/46
代理机构		代理人
主权项
地址

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