Improvements in building elements and building frame-works composed of such elements,申请号GB19550007669-传众专利搜索

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发明名称	Improvements in building elements and building frame-works composed of such elements
摘要
申请公布号	GB767900(A)	申请公布日期	1957.02.06
申请号	GB19550007669	申请日期	1955.03.16
申请人	JOHANN WILHELM LUDOWICI	发明人
分类号	E04B7/12	主分类号	E04B7/12
代理机构		代理人
主权项
地址

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