Selective double exposure prevention device,申请号US19540478393-传众专利搜索

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发明名称	Selective double exposure prevention device
摘要
申请公布号	US2829573(A)	申请公布日期	1958.04.08
申请号	US19540478393	申请日期	1954.12.29
申请人	GENERAL ANILINE & FILM CORPORATION	发明人	JACOBSON CARL H.
分类号	G03B17/42	主分类号	G03B17/42
代理机构		代理人
主权项
地址

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