Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6852780 | Composition for optical material, optical material and lenses | Takanori Fujita, Katsuyoshi Tanaka | 2005-02-08 |
| 6836814 | Mobile communication terminal device | Kentoku Yamaguchi | 2004-12-28 |
| 5340893 | Cast resin for optical use | Katsuyoshi Tanaka, Kenji Kato | 1994-08-23 |
| 5336743 | Cast resin for optical use | Katsuyoshi Tanaka, Kenji Kato | 1994-08-09 |