Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841325 | Automatic focusing device for camera | Yoshinari Hamanishi, Ken Utagawa | 1989-06-20 |
| 4816663 | Camera system with vignetting calculation and memory means | Ken Utagawa | 1989-03-28 |