Projection screen stand,申请号US19410374505-传众专利搜索

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发明名称	Projection screen stand
摘要
申请公布号	US2346274(A)	申请公布日期	1944.04.11
申请号	US19410374505	申请日期	1941.01.15
申请人	RAVEN ALBERT L	发明人	RAVEN ALBERT L.
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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