Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4778253 | Device for retaining an optical part | Naoyuki Seo, Takae Harutake, Michio Shirai | 1988-10-18 |
| 4725126 | Lens retaining device | Naoyuki Seo, Takae Harutake, Michio Shirai | 1988-02-16 |