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Osamu Nagarekawa
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Nirasaki, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Photomask blank
Patent number
D568839
Issue date
May 13, 2008
Hoya Corporation
Masaru Mitsui
D13 - Equipment for production, distribution, or transformation of energy
Information
Patent Grant
Photomask blank
Patent number
D543160
Issue date
May 22, 2007
Hoya Corporation
Masaru Mitsui
D13 - Equipment for production, distribution, or transformation of energy
Information
Patent Grant
Method of manufacturing a mask blank including a modified chromium...
Patent number
4,657,648
Issue date
Apr 14, 1987
Osamu Nagarekawa
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Photo-mask blank for use in lithography including a modified chromi...
Patent number
4,530,891
Issue date
Jul 23, 1985
Hoya Electronics Co., Ltd.
Osamu Nagarekawa
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY