Issued Patents 1989
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872743 | Varifocal optical element | Kazuhiko Matsuoka, Masayuki Usui, Kazuo Minoura, Atsushi Someya, Masayuki Suzuki | 1989-10-10 |
| 4872058 | Automatic focusing device | Yukichi Niwa | 1989-10-03 |
| 4865426 | Variable aberration imaging optical system | Kazuhiko Matsuoka, Masayuki Usui, Kazuo Minoura, Atsushi Someya, Yukuo Nishimura | 1989-09-12 |
| 4848879 | Light modulating device | Yukuo Nishimura, Yuko Miyajima, Kazuo Minoura, Kazuhiko Matsuoka, Masayuki Usui +1 more | 1989-07-18 |
| 4840473 | Optical device | Nobuo Kushibiki, Noriyuki Nose, Toshiyuki Nakajima, Masakazu Matsugu, Yukichi Niwa | 1989-06-20 |
| 4820028 | Zoom lens with a variable refractive index element | Shigeyuki Suda | 1989-04-11 |
| 4802746 | Variable-focus optical element and focus detecting device utilizing the same | Shigeyuki Suda, Noriyuki Nose, Eigo Kawakami, Toshiyuki Nakajima, Nobuo Kushibiki | 1989-02-07 |