Improvements in or relating to screens for use in connection with the optical projection of pictures,申请号GB19290017431-传众专利搜索

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发明名称	Improvements in or relating to screens for use in connection with the optical projection of pictures
摘要
申请公布号	GB329861(A)	申请公布日期	1930.05.29
申请号	GB19290017431	申请日期	1929.06.06
申请人	WILLIAM HENRY CAWDERY	发明人
分类号	G03B21/56	主分类号	G03B21/56
代理机构		代理人
主权项
地址

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