Haruhisa Hirakawa

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Mobara, JP

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Patents Grantslast 30 patents

Information Patent Grant
Field emission display device with improved dielectric breakdown ch...
- Patent number 5,965,978
- Issue date Oct 12, 1999
- Futaba Denshi Kogyo K.K.
- Takao Kishino
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Field emission display device
- Patent number 5,955,850
- Issue date Sep 21, 1999
- Futaba Denshi Kogyo K.K.
- Satoshi Yamaguchi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Color filter and fluorescent display device having color filters in...
- Patent number 5,606,462
- Issue date Feb 25, 1997
- Futaba Denshi Kogyo K.K.
- Yoshihisa Tsuruoka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Color filter and fluorescent display device having color filters in...
- Patent number 5,559,397
- Issue date Sep 24, 1996
- Futaba Denshi Kogyo K.K.
- Yoshihisa Tsuruoka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Flourescent display device having a protective film interposed betw...
- Patent number 5,543,685
- Issue date Aug 6, 1996
- Futaba Denshi Kogyo K.K.
- Yoshinari Okamoto
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Fluorescent display device with high duty ratio
- Patent number 5,387,838
- Issue date Feb 7, 1995
- Futaba Denshi Kogyo K.K.
- Haruhisa Hirakawa
- H01 - BASIC ELECTRIC ELEMENTS