Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5886815 | Binoculars with dioptric and focus adjustment | — | 1999-03-23 |
| 5822115 | Thin adjustable binoculars | Kaoru Umeda, Naoki Ishihara, Kesaji Sato, Muneo Kubota | 1998-10-13 |
| 5729384 | Compact telescope | Yasumasa Sugihara | 1998-03-17 |
| 5640271 | Self-housing binocular | Yasumasa Sugihara, Hiroyuki Okada | 1997-06-17 |
| 5610761 | Telescope having mechanism for automatically returning optical system to a reference dioptric power | Kenji Ishibashi, Kazuo Kimura, Iwao Ishida | 1997-03-11 |
| 4609947 | Video signal recording apparatus | Kazuo Yamagiwa, Koichi Takeuchi, Seiji Sato | 1986-09-02 |