Process of forming a multifocal lens,申请号US19490131634-传众专利搜索

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发明名称	Process of forming a multifocal lens
摘要
申请公布号	US2640299(A)	申请公布日期	1953.06.02
申请号	US19490131634	申请日期	1949.12.07
申请人	AMERICAN OPTICAL COMPANY	发明人	SHEARD SAMUEL T.;ROWE LOUIS F.
分类号	C03B23/22	主分类号	C03B23/22
代理机构		代理人
主权项
地址

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