Compound ventilating shutter,申请号US19290368480-传众专利搜索

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发明名称	Compound ventilating shutter
摘要
申请公布号	US1787426(A)	申请公布日期	1931.01.06
申请号	US19290368480	申请日期	1929.06.05
申请人	INTERNATIONAL PROJECTOR CORPORATION	发明人	DINA AUGUSTO
分类号	G03B9/10	主分类号	G03B9/10
代理机构		代理人
主权项
地址

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