Preassembled screw and lock washer unit,申请号US19390311871-传众专利搜索

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发明名称	Preassembled screw and lock washer unit
摘要
申请公布号	US2270813(A)	申请公布日期	1942.01.20
申请号	US19390311871	申请日期	1939.12.30
申请人	ILLINOIS TOOL WORKS	发明人	OLSON CARL G.
分类号	F16B39/24	主分类号	F16B39/24
代理机构		代理人
主权项
地址

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