Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6706894 | Thiol compound, method for producing the same and optical product made with the same | Ken Takamatsu | 2004-03-16 |
| 6696540 | Episulfide compound, method for producing the same and optical product comprising the same | Ken Takamatsu | 2004-02-24 |