Improvements in or relating to roofs,申请号GB19390032822-传众专利搜索

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发明名称	Improvements in or relating to roofs
摘要
申请公布号	GB537494(A)	申请公布日期	1941.06.24
申请号	GB19390032822	申请日期	1939.12.23
申请人	J. B. JOHNSON & COMPANY LIMITED;JAMES SCOTT	发明人
分类号	E04B7/00	主分类号	E04B7/00
代理机构		代理人
主权项
地址

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