Relief picture viewing screen,申请号US19300491832-传众专利搜索

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发明名称	Relief picture viewing screen
摘要
申请公布号	US1882829(A)	申请公布日期	1932.10.18
申请号	US19300491832	申请日期	1930.10.29
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	HALL HOWARD
分类号	G03B21/60	主分类号	G03B21/60
代理机构		代理人
主权项
地址

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