Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6639642 | Display device having diffraction grating | Toshihiro Suzuki, Yukio Iigahama, Hisashi Yamaguchi, Takeshi Gotoh, Tetsuya Hamada +7 more | 2003-10-28 |
| 6380994 | Fresnel lens and liquid crystal display device | Yukio Iigahama | 2002-04-30 |
| 6211932 | Fresnel lens and liquid crystal display device | Yukio Iigahama | 2001-04-03 |
| 5959704 | Display device having diffraction grating | Toshihiro Suzuki, Yukio Iigahama, Hisashi Yamaguchi, Takeshi Gotoh, Tetsuya Hamada +7 more | 1999-09-28 |
| 5863114 | Light emissive panel unit | Shinpei Nagatani, Fumiaki Yamada, Masaki Miyahara, Katsunori Tanaka | 1999-01-26 |
| 5799126 | Light guide device, light source device, and liquid crystal display device | Shinpei Nagatani, Fumiaki Yamada | 1998-08-25 |
| 5764845 | Light guide device, light source device, and liquid crystal display device | Shinpei Nagatani, Fumiaki Yamada | 1998-06-09 |
| 5751387 | Fresnel lens and liquid crystal display device | Yukio Iigahama | 1998-05-12 |