Improvements in or relating to draught excluding means,申请号GB19440021951-传众专利搜索

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发明名称	Improvements in or relating to draught excluding means
摘要
申请公布号	GB583617(A)	申请公布日期	1946.12.23
申请号	GB19440021951	申请日期	1944.11.08
申请人	FREDERICK ROBERT PORTER	发明人
分类号	E06B7/22	主分类号	E06B7/22
代理机构		代理人
主权项
地址

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