Improvements in or relating to covers for manholes and like openings,申请号GB19390004699-传众专利搜索

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发明名称	Improvements in or relating to covers for manholes and like openings
摘要
申请公布号	GB523186(A)	申请公布日期	1940.07.08
申请号	GB19390004699	申请日期	1939.02.13
申请人	BROAD & COMPANY LIMITED;HAROLD EZRA ROBINSON	发明人
分类号	E03F5/042	主分类号	E03F5/042
代理机构		代理人
主权项
地址

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