Improvements in or relating to postal knockers and letter plates,申请号GB19380037115-传众专利搜索

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发明名称	Improvements in or relating to postal knockers and letter plates
摘要
申请公布号	GB522916(A)	申请公布日期	1940.07.01
申请号	GB19380037115	申请日期	1938.12.21
申请人	JOHN CHARLES COLEMAN	发明人
分类号	E05D15/00	主分类号	E05D15/00
代理机构		代理人
主权项
地址

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