Transparent vacuum back,申请号US19490109768-传众专利搜索

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发明名称	Transparent vacuum back
摘要
申请公布号	US2584401(A)	申请公布日期	1952.02.05
申请号	US19490109768	申请日期	1949.08.11
申请人	THRALLS MARVIN A	发明人	THRALLS MARVIN A.
分类号	G03B27/20	主分类号	G03B27/20
代理机构		代理人
主权项
地址

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