Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6640876 | Method and apparatus for manufacturing copper and/or copper alloy ingot having no shrinkage cavity and having smooth surface without wrinkles | Kenji Yajima, Norikazu Ishida, Yutaka Koshiba, Keiji Nogami | 2003-11-04 |