Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5166830 | Aspherical lens system for a bar code sensor | Isao Ishibai, Hideaki Koyanagi | 1992-11-24 |
| 5087115 | Aspherical glass lens element suitable for an object lens element of a disk device | Isao Ishibai, Yutaka Kawai | 1992-02-11 |
| 5020888 | Aspherical glass lens element suitable for a collimator lens | Isao Ishibai | 1991-06-04 |
| 5004330 | Aspherical glass lens element formed by a low dispersion glass material | Isao Ishibai | 1991-04-02 |