Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887897 | Eye examining apparatus | Yukichi Niwa | 1989-12-19 |
| 4842408 | Phase shift measuring apparatus utilizing optical meterodyne techniques | Minoru Yoshii, Yukichi Niwa, Yoshimichi Okada | 1989-06-27 |
| 4840473 | Optical device | Nobuo Kushibiki, Toshiyuki Nakajima, Takeshi Baba, Masakazu Matsugu, Yukichi Niwa | 1989-06-20 |
| 4802746 | Variable-focus optical element and focus detecting device utilizing the same | Takeshi Baba, Shigeyuki Suda, Eigo Kawakami, Toshiyuki Nakajima, Nobuo Kushibiki | 1989-02-07 |