Self-tapping screw,申请号US19370182743-传众专利搜索

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发明名称	Self-tapping screw
摘要
申请公布号	US2167559(A)	申请公布日期	1939.07.25
申请号	US19370182743	申请日期	1937.12.31
申请人	THE LAMSON & SESSIONS COMPANY	发明人	UPSON RALPH H.
分类号	F16B25/00;F16B37/00	主分类号	F16B25/00
代理机构		代理人
主权项
地址

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