Improvements in or relating to projection screens,申请号GB19370014431-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	GB496211(A)	申请公布日期	1938.11.24
申请号	GB19370014431	申请日期	1937.05.24
申请人	KENNETH JACK WHISTANCE	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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