Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889687 | Nodular cast iron having a high impact strength and process of treating the same | Yasuoki Ishihara, Jun Sakai, Takeshi Natsume | 1989-12-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889687 | Nodular cast iron having a high impact strength and process of treating the same | Yasuoki Ishihara, Jun Sakai, Takeshi Natsume | 1989-12-26 |