Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5687401 | High variable-power ratio, high aperture ratio, zoom optical system | Kazuyasu Ohashi, Akiko Ozawa | 1997-11-11 |
AK
Atsushi Kawamura
Overall (1997): #174,466 of 185,788Top 95%
1
Patents 1997