Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE37514 | Dark gray colored glass | Takashi Kijima | 2002-01-15 |
| 6071840 | Dark green colored glass | Takashi Kijima, Shiro Tanii | 2000-06-06 |
| 5908702 | Ultraviolet ray absorbing colored glass | Setsuko Mita, Toru Kudo, Shiro Tanii, Takashi Kijima | 1999-06-01 |
| 5905047 | Dark gray colored glass | Takashi Kijima | 1999-05-18 |