Improvements in or relating to methods of and apparatus for, producing multifocal lens blanks and multifocal lens blanks so produced,申请号GB19570019230-传众专利搜索

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发明名称	Improvements in or relating to methods of and apparatus for, producing multifocal lens blanks and multifocal lens blanks so produced
摘要
申请公布号	GB822985(A)	申请公布日期	1959.11.04
申请号	GB19570019230	申请日期	1957.06.18
申请人	AMERICAN OPTICAL COMPANY	发明人
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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