Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4810069 | Collimator optical system for effecting elliptical-to-circular conversion | — | 1989-03-07 |
| 4488037 | Automatic focusing binocular | Isao Ishibai | 1984-12-11 |
| 4436386 | Binoculars housing | Isao Ishibai | 1984-03-13 |
| 4293187 | Binocular optical system with automatic focussing | Isao Ishibai | 1981-10-06 |
| 4284325 | Eye span adjustment mechanism for binoculars | Isao Ishibai | 1981-08-18 |
| 4262988 | Binoculars with automatic focusing system | Isao Ishibai | 1981-04-21 |