Pressed steel crosstie,申请号US19300488444-传众专利搜索

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发明名称	Pressed steel crosstie
摘要
申请公布号	US1826554(A)	申请公布日期	1931.10.06
申请号	US19300488444	申请日期	1930.10.13
申请人	CHARLES LEONARD	发明人	LEONARD CHARLES
分类号	E01B3/18	主分类号	E01B3/18
代理机构		代理人
主权项
地址

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