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Eun S. Keum
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Suwon, KR
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last 30 patents
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Patent Grant
Phase shift mask and method of manufacture
Patent number
5,728,491
Issue date
Mar 17, 1998
Goldstar Electron Co., Ltd.
Eun Seop Keum
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Method of manufacturing a phase shift mask comprising two phase shi...
Patent number
5,300,377
Issue date
Apr 5, 1994
Gold Star Electron Co., Ltd.
Eun S. Keum
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Polarizing exposure apparatus using a polarizer and method for fabr...
Patent number
5,245,470
Issue date
Sep 14, 1993
Gold Star Electron Co., Ltd.
Eun S. Keum
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY