Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6607850 | Hard steel articles | Yumin Wang, Yoshito Hanayama, Naosumi Tada, Kunihiko Mishima | 2003-08-19 |
| 6582765 | Carbide coated steel articles and method of making them | Yumin Wang, Yoshito Hanayama, Naosumi Tada, Kunihiko Mishima | 2003-06-24 |