Improvements in or relating to projection screens,申请号GB19380027897-传众专利搜索

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发明名称	Improvements in or relating to projection screens
摘要
申请公布号	GB519632(A)	申请公布日期	1940.04.02
申请号	GB19380027897	申请日期	1938.09.24
申请人	NATIONAL SCREEN SERVICE LIMITED;CECIL MILTON HEPWORTH;PAUL KIMBERLEY	发明人
分类号	G03B21/58	主分类号	G03B21/58
代理机构		代理人
主权项
地址

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