Issued Patents 1989
Showing 1–7 of 7 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, Keiji Ikemori, Tsunefumi Tanaka | 1989-09-12 |
| 4859040 | Optical system having gradient-index lens and method for correcting aberrations | Jun Hattori | 1989-08-22 |
| 4844602 | Optical system for deflecting image | Shoichi Yamazaki | 1989-07-04 |
| 4842395 | Finder of variable magnification | Yasuhisa Sato, Yasuyuki Yamada, Hiroki Nakayama, Kouji Oizumi | 1989-06-27 |
| 4842386 | Variable focal length objective | Hiroki Nakayama, Shigeyuki Suda, Jun Hattori, Akihisa Horiuchi | 1989-06-27 |
| 4830477 | Zoom lens capable of obtaining focal lengths beyond a variable focal length range | Sadatoshi Takahashi, Keiji Ikemori, Tsunefumi Tanaka, Takashi Matsushita, Kikuo Momiyama | 1989-05-16 |
| 4810070 | Lens system having a good image performance for white light | Shigeyuki Suda, Jun Hattori, Hiroki Nakayama, Akihisa Horiuchi | 1989-03-07 |