Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5414562 | Zoom lens | — | 1995-05-09 |
| 5202992 | Zoom lens apparatus | Makoto Banno, Nobuyuki Adachi, Hiroshi Miyamae | 1993-04-13 |
| 5048940 | Projection lens for projector | Akira Ishisaka | 1991-09-17 |
| 5015076 | Projection lens for a projector | — | 1991-05-14 |
| 4838670 | Projection lens for a projector | Norikazu Arai | 1989-06-13 |