Bifocal lens blank,申请号US19420437135-传众专利搜索

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发明名称	Bifocal lens blank
摘要
申请公布号	US2333362(A)	申请公布日期	1943.11.02
申请号	US19420437135	申请日期	1942.04.01
申请人	CLEMENT GEORGE A	发明人	CLEMENT GEORGE A.
分类号	G02C7/02	主分类号	G02C7/02
代理机构		代理人
主权项
地址

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