Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6652781 | Method for manufacture of optical element | Hideo Kato, Hiroshi Maehara | 2003-11-25 |
| 6562253 | Method of producing an optical element having a multiple-level step-like structure through lithography | — | 2003-05-13 |