Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887404 | Translucent glass brick made of opal glass with light diffusible crystal particles | Kosaburo Saji, Katsuhiko Imai | 1989-12-19 |
| 4858580 | Knocking control system for internal combustion engine | Katsuya Kamise | 1989-08-22 |
| 4856481 | Engine knocking control unit | Katsuya Kamise, Tetsushi Hosokai, Koji Miyamoto | 1989-08-15 |