Washer and method of making,申请号US19370158749-传众专利搜索

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发明名称	Washer and method of making
摘要
申请公布号	US2193661(A)	申请公布日期	1940.03.12
申请号	US19370158749	申请日期	1937.08.12
申请人	YOUNG LEONARD A	发明人	YOUNG LEONARD A.
分类号	B21D53/22;B21F37/02	主分类号	B21D53/22
代理机构		代理人
主权项
地址

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