Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871411 | Method of preparing volume type hologram film | Yoko Yoshinaga, Naosato Taniguchi, Tetsuro Kuwayama | 1989-10-03 |
| 4840473 | Optical device | Noriyuki Nose, Toshiyuki Nakajima, Takeshi Baba, Masakazu Matsugu, Yukichi Niwa | 1989-06-20 |
| 4802746 | Variable-focus optical element and focus detecting device utilizing the same | Takeshi Baba, Shigeyuki Suda, Noriyuki Nose, Eigo Kawakami, Toshiyuki Nakajima | 1989-02-07 |