Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840146 | Multiple throttle mechanism for internal combustion engines | Shozo Yanagisawa, Isamu Ishizawa | 1989-06-20 |
| 4809659 | Motor-driven throttle valve assembly | Isamu Ishizawa | 1989-03-07 |