Improvements in or relating to air bricks, ventilating ducts and the like,申请号GB19380033377-传众专利搜索

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发明名称	Improvements in or relating to air bricks, ventilating ducts and the like
摘要
申请公布号	GB525257(A)	申请公布日期	1940.08.26
申请号	GB19380033377	申请日期	1938.11.17
申请人	GEORGE MARSHMAN;ALFRED LESLIE MARSHMAN	发明人
分类号	F24F13/14	主分类号	F24F13/14
代理机构		代理人
主权项
地址

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