Fluid lens construction,申请号US19460660057-传众专利搜索

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发明名称	Fluid lens construction
摘要
申请公布号	US2490873(A)	申请公布日期	1949.12.13
申请号	US19460660057	申请日期	1946.04.06
申请人	JOHNSON JOHN A	发明人	JOHNSON JOHN A.
分类号		主分类号
代理机构		代理人
主权项
地址

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