Moving-picture projection screen,申请号US19430505977-传众专利搜索

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发明名称	Moving-picture projection screen
摘要
申请公布号	US2435620(A)	申请公布日期	1948.02.10
申请号	US19430505977	申请日期	1943.10.12
申请人	ALEXANDER WILLIAM W	发明人	ALEXANDER WILLIAM W.
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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