Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869644 | Blades for propeller fan | — | 1989-09-26 |
| 4859150 | Blades for low speed propeller fan | — | 1989-08-22 |
| 4846629 | Blades for high speed propeller fan | — | 1989-07-11 |
| 4840348 | Valve actuator for slide exhaust brake systems | Roichi Suzuki | 1989-06-20 |