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Kenichi Kagaya
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Tokyo, JP
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last 30 patents
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Patent Grant
Photo-mask blank comprising a shading layer having a variable etch...
Patent number
4,696,877
Issue date
Sep 29, 1987
Hoya Corporation
Shigekazu Matsui
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Photo-mask blank comprising a shading layer having a variable etch...
Patent number
4,563,407
Issue date
Jan 7, 1986
Hoya Corporation
Shigekazu Matsui
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY