Issued Patents All Time
Showing 51–52 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4297571 | Focus detecting device | Ken Utagawa, Kunihisa Hoshino, Hiroshi Shirasu | 1981-10-27 |
| 4291224 | Light image space frequency component extracting device | Hiroshi Shirasu, Ken Utagawa | 1981-09-22 |