RAILROAD BALLAST HANDLING SYSTEM,申请号US19670672406-传众专利搜索

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发明名称	RAILROAD BALLAST HANDLING SYSTEM
摘要
申请公布号	US3427990(A)	申请公布日期	1969.02.18
申请号	US19670672406	申请日期	1967.07.11
申请人	TRAKWORK EQUIPMENT CO.	发明人	JOHN F. BRYAN JR.
分类号	E01B27/02;E01B27/04;E01B27/16;E01B29/14;(IPC1-7):E01B27/06;E02F5/00	主分类号	E01B27/02
代理机构		代理人
主权项
地址

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