Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859040 | Optical system having gradient-index lens and method for correcting aberrations | Nozomu Kitagishi | 1989-08-22 |
| 4848882 | Gradient index lens | Masayuki Suzuki | 1989-07-18 |
| 4842386 | Variable focal length objective | Nozomu Kitagishi, Hiroki Nakayama, Shigeyuki Suda, Akihisa Horiuchi | 1989-06-27 |
| 4810070 | Lens system having a good image performance for white light | Shigeyuki Suda, Nozomu Kitagishi, Hiroki Nakayama, Akihisa Horiuchi | 1989-03-07 |