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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Halftone phase shifting photomask and blanks for halftone phase shi...
Patent number
6,780,547
Issue date
Aug 24, 2004
Dainippon Printing Co., Ltd.
Toshiaki Motonaga
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Halftone phase shift photomask and blanks for halftone phase shift...
Patent number
6,709,791
Issue date
Mar 23, 2004
Dai Nippon Printing Co., Ltd.
Hiroshi Mohri
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Halftone phase shift photomask, halftone phase shift photomask blan...
Patent number
5,916,712
Issue date
Jun 29, 1999
Dai Nippon Printing Co., Ltd.
Hiroyuki Miyashita
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Halftone phase shift photomask, halftone phase shift photomask blan...
Patent number
5,738,959
Issue date
Apr 14, 1998
Dai Nippon Printing Co., Ltd.
Hiroyuki Miyashita
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Gradation mask and process for producing the same
Patent number
5,725,975
Issue date
Mar 10, 1998
Dai Nippon Printing Co., Ltd.
Hiroyuki Nakamura
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Phase shift photomask
Patent number
5,387,485
Issue date
Feb 7, 1995
Dai Nippon Printing Co., Ltd.
Makoto Sukegawa
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Patents Applications
last 30 patents
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Patent Application
Halftone phase shifting photomask and blanks for halftone phase shi...
Publication number
20020015187
Publication date
Feb 7, 2002
Toshiaki Motonaga
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY