Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684645 | Lens moving apparatus preventing resonance without using yoke bridge and counterweight | Koji Mitsumori, Keiichi Shibata, Hideo Ohkuma | 1997-11-04 |
| 5657172 | Objective lens driving device | Keiichi Shibata, Koji Mitsumori | 1997-08-12 |