Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6215936 | Lightguide having trapezoidally-shaped main body with a level surface at an angle to a rear surface | Toshiyuki Yoshikawa, Osamu Shinji, Toshitaka Kunisawa | 2001-04-10 |
| 5776636 | Method of manufacturing light-transmitting plates | Toshitaka Kunisawa, Osamu Shinji, Toshiyuki Yoshikawa | 1998-07-07 |