Guard for safety zones,申请号US19300467721-传众专利搜索

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发明名称	Guard for safety zones
摘要
申请公布号	US1870639(A)	申请公布日期	1932.08.09
申请号	US19300467721	申请日期	1930.07.14
申请人	JOHN MUELLER	发明人	MUELLER JOHN
分类号	E01F15/14	主分类号	E01F15/14
代理机构		代理人
主权项
地址

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