Electrically insulated rail joint means,申请号US19670648510-传众专利搜索

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发明名称	Electrically insulated rail joint means
摘要
申请公布号	US3369752(A)	申请公布日期	1968.02.20
申请号	US19670648510	申请日期	1967.04.27
申请人	MINNESOTA MINING AND MANUFACTURING COMPANY	发明人	YOUNGWARD ROBERT W.;KOVALCHUK ALEX
分类号	E01B11/54	主分类号	E01B11/54
代理机构		代理人
主权项
地址

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