Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6067137 | Image display apparatus with hydrophobic diffraction grating for an enlarged viewing angle | Katsuya Fujisawa, Rikuji Watanabe, Katsuhiko Hayashi | 2000-05-23 |
| 6002464 | Light diffusing sheet having a layer incorporated with light diffusing material and a layer with a corrugated surface | Katsuya Fujisawa, Rikuji Watanabe, Katsuhiko Hayashi | 1999-12-14 |
| 5754342 | Video device utilizing a two-dimensional diffraction grating | Katsuya Fujisawa | 1998-05-19 |
| 5467224 | Optical low pass filter and imaging device using the same | Katsuya Fujisawa | 1995-11-14 |