Method of making ratchet bars,申请号US19360070071-传众专利搜索

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发明名称	Method of making ratchet bars
摘要
申请公布号	US2153524(A)	申请公布日期	1939.04.04
申请号	US19360070071	申请日期	1936.03.21
申请人	RYERSON & HAYNES, INC.	发明人	SCHMIDT FRANK W.
分类号	B21D53/00	主分类号	B21D53/00
代理机构		代理人
主权项
地址

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