Self-centering drive screw,申请号US19300442863-传众专利搜索

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发明名称	Self-centering drive screw
摘要
申请公布号	US1802668(A)	申请公布日期	1931.04.28
申请号	US19300442863	申请日期	1930.04.09
申请人		发明人	NEWTON FRANK E.
分类号	F16B15/06;F16B25/00	主分类号	F16B15/06
代理机构		代理人
主权项
地址

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