Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5204781 | Infinite large-aperture lens system with aspherical surfaces | Yutaka Kawai | 1993-04-20 |
| 5166830 | Aspherical lens system for a bar code sensor | Hideaki Koyanagi, Hitonobu Otsu | 1992-11-24 |
| 5087115 | Aspherical glass lens element suitable for an object lens element of a disk device | Hitonobu Otsu, Yutaka Kawai | 1992-02-11 |
| 5020888 | Aspherical glass lens element suitable for a collimator lens | Hitonobu Otsu | 1991-06-04 |
| 5004330 | Aspherical glass lens element formed by a low dispersion glass material | Hitonobu Otsu | 1991-04-02 |
| 5002374 | Finite conjugation large-aperture lens with aspherical surfaces | Yutaka Kawai | 1991-03-26 |
| 4776101 | Method and apparatus for testing aspherical lenses | — | 1988-10-11 |
| 4650297 | Binocular optical system with automatic focusing mechanism | — | 1987-03-17 |
| 4488037 | Automatic focusing binocular | Kunimitsu Kobayashi | 1984-12-11 |
| 4436386 | Binoculars housing | Kunimitsu Kobayashi | 1984-03-13 |
| 4293187 | Binocular optical system with automatic focussing | Kunimitsu Kobayashi | 1981-10-06 |
| 4284325 | Eye span adjustment mechanism for binoculars | Kunimitsu Kobayashi | 1981-08-18 |
| 4262988 | Binoculars with automatic focusing system | Kunimitsu Kobayashi | 1981-04-21 |