Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6259854 | Lightguide | Osamu Shinji, Toshiyuki Yoshikawa, Kozo Yasuda | 2001-07-10 |
| 6215936 | Lightguide having trapezoidally-shaped main body with a level surface at an angle to a rear surface | Toshiyuki Yoshikawa, Osamu Shinji, Kouzo Yasuda | 2001-04-10 |
| 5776636 | Method of manufacturing light-transmitting plates | Osamu Shinji, Kouzo Yasuda, Toshiyuki Yoshikawa | 1998-07-07 |