Draft attachment for excavating machines,申请号US19310511124-传众专利搜索

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发明名称	Draft attachment for excavating machines
摘要
申请公布号	US1838770(A)	申请公布日期	1931.12.29
申请号	US19310511124	申请日期	1931.01.26
申请人	AMERICAN MANGANESE STEEL COMPANY	发明人	KNIGHT HERVEY S.
分类号	E02F3/60	主分类号	E02F3/60
代理机构		代理人
主权项
地址

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