Manhole frame and cover,申请号US19640359646-传众专利搜索

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发明名称	Manhole frame and cover
摘要
申请公布号	US3289556(A)	申请公布日期	1966.12.06
申请号	US19640359646	申请日期	1964.04.14
申请人	PHOENIX IRON WORKS	发明人	RUSSELL CLAYTON D.
分类号	E02D29/14	主分类号	E02D29/14
代理机构		代理人
主权项
地址

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