Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802746 | Variable-focus optical element and focus detecting device utilizing the same | Takeshi Baba, Shigeyuki Suda, Noriyuki Nose, Toshiyuki Nakajima, Nobuo Kushibiki | 1989-02-07 |