Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875519 | Method of manufacturing hollow billet and apparatus therefor | Yoh Ishii, Masami Abe, Atsumi Takasugi, Kazumi Kato | 1989-10-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875519 | Method of manufacturing hollow billet and apparatus therefor | Yoh Ishii, Masami Abe, Atsumi Takasugi, Kazumi Kato | 1989-10-24 |