Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5818643 | Optical objective lens system with variable disk thickness feature | — | 1998-10-06 |
| 4733952 | Small zoom lens | — | 1988-03-29 |
| 4634235 | Lens system capable of converting focal length by addition of a lens | — | 1987-01-06 |
| 4629292 | Small telephoto zoom lens | — | 1986-12-16 |
| 4620775 | Front-diaphragm wide angle lens | — | 1986-11-04 |
| 4579428 | Small zoom lens | — | 1986-04-01 |
| 4527867 | Wide angle zoom lens | Atsushi Kawamura | 1985-07-09 |
| 4488788 | Small-size wide angle lens | — | 1984-12-18 |
| 4443070 | Camera lens system with long back focal distance and large aperture ratio | — | 1984-04-17 |
| 4372654 | Telephoto zoom lens | Atsushi Kawamura | 1983-02-08 |