Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6593415 | Graded-refractive-index optical plastic material and method for its production | Yasuhiro Koike | 2003-07-15 |
| 6590036 | Graded-refractive-index optical plastic material and method for its production | Yasuhiro Koike | 2003-07-08 |