Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6309080 | Surface light source device and liquid crystal display | Hiromi Sasako | 2001-10-30 |
| 6275338 | Light regulation device | Takayuki Arai | 2001-08-14 |
| 6199994 | Surface light source device of side light type | — | 2001-03-13 |
| 5971559 | Surface light source device | Tsuyoshi Ishikawa, Kazuaki Yokoyama | 1999-10-26 |
| 5961197 | Surface light source device | Hiromi Sasako | 1999-10-05 |
| 5810464 | Surface light source device of side light type | Tsuyoshi Ishikawa, Kazuaki Yokoyama | 1998-09-22 |
| 5788356 | Surface light source device of side light type | Kayoko Masaki, Hiromi Sasako | 1998-08-04 |
| 5779338 | Surface light source device | Tsuyoshi Ishikawa, Kazuaki Yokoyama | 1998-07-14 |
| 5772305 | Surface illuminant device | Tsuyoshi Ishikawa | 1998-06-30 |
| 5600455 | Prismatic member with coarsened portions or triangular prismatic and semi-circular prismatic members arranged on a flat light emitting surface | Tsuyoshi Ishikawa, Kazuaki Yokoyama | 1997-02-04 |
| 5575549 | Surface light source device | Tsuyoshi Ishikawa, Kazuaki Yokoyama | 1996-11-19 |
| 5572411 | Surface light source device | Tsuyoshi Ishikawa | 1996-11-05 |
| 5528709 | Corner supply type plane light source device | Yasuhiro Koike | 1996-06-18 |
| 5402324 | Surface illuminant device | Kazuaki Yokoyama, Tsuyoshi Ishikawa | 1995-03-28 |