Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4854682 | Compact high vari-focal ratio zoom lens system | — | 1989-08-08 |
| 4840467 | Compact zoom lens system with a high zooming ratio | Katsuhiro Takada | 1989-06-20 |
| 4836662 | Telephoto zoom lens system | Yasuji Ogata | 1989-06-06 |
| 4822152 | Compact high-vari-focal ratio zoom lens system | — | 1989-04-18 |
| 4815829 | Telephoto zoom lens system | Yasuji Ogata | 1989-03-28 |