Film data projection device,申请号US19440522734-传众专利搜索

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发明名称	Film data projection device
摘要
申请公布号	US2419041(A)	申请公布日期	1947.04.15
申请号	US19440522734	申请日期	1944.02.17
申请人	STEWART GEORGE R	发明人	STEWART GEORGE R.
分类号	G11B7/00	主分类号	G11B7/00
代理机构		代理人
主权项
地址

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