Issued Patents 1989
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874230 | Zoom lens with a variable power lens element | — | 1989-10-17 |
| 4871240 | Zoom lens system having a lens unit with a variable refractive power | — | 1989-10-03 |
| 4859041 | Variable focus optical device | — | 1989-08-22 |
| 4852981 | Imaging lens system comprising a distributed index lens and a plano-convex lens | — | 1989-08-01 |
| 4842386 | Variable focal length objective | Nozomu Kitagishi, Hiroki Nakayama, Jun Hattori, Akihisa Horiuchi | 1989-06-27 |
| 4828373 | Aspherical single lens | Masayuki Suzuki | 1989-05-09 |
| 4820028 | Zoom lens with a variable refractive index element | Takeshi Baba | 1989-04-11 |
| 4810070 | Lens system having a good image performance for white light | Jun Hattori, Nozomu Kitagishi, Hiroki Nakayama, Akihisa Horiuchi | 1989-03-07 |
| 4802746 | Variable-focus optical element and focus detecting device utilizing the same | Takeshi Baba, Noriyuki Nose, Eigo Kawakami, Toshiyuki Nakajima, Nobuo Kushibiki | 1989-02-07 |