Optical projection apparatus for daylight projection and demonstration,申请号US19460680919-传众专利搜索

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发明名称	Optical projection apparatus for daylight projection and demonstration
摘要
申请公布号	US2484505(A)	申请公布日期	1949.10.11
申请号	US19460680919	申请日期	1946.07.02
申请人	WILLIAM HANSEL CARL	发明人	HANSEL CARL WILLIAM
分类号	G03B21/132	主分类号	G03B21/132
代理机构		代理人
主权项
地址

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