Portable film projecting and viewing apparatus,申请号US19500199249-传众专利搜索

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发明名称	Portable film projecting and viewing apparatus
摘要
申请公布号	US2634652(A)	申请公布日期	1953.04.14
申请号	US19500199249	申请日期	1950.12.05
申请人	THE FR CORPORATION	发明人	BARTH ROBERT M.
分类号	G03B21/30	主分类号	G03B21/30
代理机构		代理人
主权项
地址

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