Yukio Iigahama

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Kawasaki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Display device having diffraction grating
- Patent number 6,639,642
- Issue date Oct 28, 2003
- Fujitsu Limited
- Toshihiro Suzuki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Fresnel lens and liquid crystal display device
- Patent number 6,380,994
- Issue date Apr 30, 2002
- Fujitsu Limited
- Yukio Iigahama
- G02 - OPTICS
Information Patent Grant
Fresnel lens and liquid crystal display device
- Patent number 6,211,932
- Issue date Apr 3, 2001
- Fujitsu Limited
- Yukio Iigahama
- G02 - OPTICS
Information Patent Grant
Display device having diffraction grating
- Patent number 5,959,704
- Issue date Sep 28, 1999
- Fujitsu Limited
- Toshihiro Suzuki
- G02 - OPTICS
Information Patent Grant
Fresnel lens and liquid crystal display device
- Patent number 5,751,387
- Issue date May 12, 1998
- Fujitsu Limited
- Yukio Iigahama
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS