Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4357085 | Focus detection device | Yukichi Niwa, Noriyuki Asano | 1982-11-02 |
| 4315159 | Optical sensor device with reduction of ambient light effects | Yukichi Niwa, Noriyuki Asano, Masahiko Ogawa, Shuichi Tamura | 1982-02-09 |