Means for and method of making lock washers,申请号US19310524453-传众专利搜索

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发明名称	Means for and method of making lock washers
摘要
申请公布号	US1915612(A)	申请公布日期	1933.06.27
申请号	US19310524453	申请日期	1931.03.23
申请人	SHAKEPROOF LOCK WASHER COMPANY	发明人	OLSON CARL G.
分类号	B21D53/20	主分类号	B21D53/20
代理机构		代理人
主权项
地址

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