Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4931227 | Molding of light reflector | Sumio Nakahashi, Nobuki Seike | 1990-06-05 |
| 4830899 | Light reflection material, its manufacture and application | Sumio Nakahashi, Nobuki Seike | 1989-05-16 |