Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5655827 | Surface light source device | Isamu Kaneko, Hideaki Katoh, Tsuyoshi Ishikawa | 1997-08-12 |
| 5600455 | Prismatic member with coarsened portions or triangular prismatic and semi-circular prismatic members arranged on a flat light emitting surface | Tsuyoshi Ishikawa, Kayoko Watai | 1997-02-04 |