Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889688 | Process of producing nodular cast iron | Makoto Suenaga, Jun Sakai, Takeshi Natsume | 1989-12-26 |
| 4807728 | Brake member and method of manufacturing same | Makoto Suenaga | 1989-02-28 |