A PHOTO-MASK FOR USE IN MANUFACTURING AN OPTICAL MEMORY DISC, A METHOD FOR MAKING THE PHOTO-MASK AND A METHOD FOR MANUFACTURING THE OPTICAL MEMORY DISC,申请号EP19870105243-传众专利搜索

发明名称	A PHOTO-MASK FOR USE IN MANUFACTURING AN OPTICAL MEMORY DISC, A METHOD FOR MAKING THE PHOTO-MASK AND A METHOD FOR MANUFACTURING THE OPTICAL MEMORY DISC
摘要
申请公布号	EP0241028(B1)	申请公布日期	1992.09.02
申请号	EP19870105243	申请日期	1987.04.09
申请人	SHARP KABUSHIKI KAISHA	发明人	KENJI, OHTA;AKIRA, TAKAHASHI;TETSUYA, INUI;JUNJI, HIROKANE;HIROYUKI, KATAYAMA
分类号	G11B7/26	主分类号	G11B7/26
代理机构		代理人
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