Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870454 | Apparatus for and method of stabilizing the quantity of light of fluorescent lamp | Kazuma Kan, Hiroshi Tamura | 1989-09-26 |
| 4817180 | Image signal filtering | Masamichi Cho | 1989-03-28 |