Combined slide and card projection apparatus for television,申请号US19510255806-传众专利搜索

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发明名称	Combined slide and card projection apparatus for television
摘要
申请公布号	US2750444(A)	申请公布日期	1956.06.12
申请号	US19510255806	申请日期	1951.11.10
申请人	OWENS FREEMAN H	发明人	OWENS FREEMAN H.
分类号	G03B21/00;H04N3/00	主分类号	G03B21/00
代理机构		代理人
主权项
地址

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