Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865434 | Zoom lens capable of selecting a focal length beyond a standard focal length range | Takashi Matsushita, Sadatoshi Takahashi, Nozomu Kitagishi, Keiji Ikemori | 1989-09-12 |
| 4861147 | Zoom lens system | — | 1989-08-29 |
| 4842385 | Zoom lens | — | 1989-06-27 |
| 4840468 | Focusing method for zoom lens | — | 1989-06-20 |
| 4830477 | Zoom lens capable of obtaining focal lengths beyond a variable focal length range | Sadatoshi Takahashi, Keiji Ikemori, Nozomu Kitagishi, Takashi Matsushita, Kikuo Momiyama | 1989-05-16 |