Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6680129 | Steel composition | Yumin Wang, Yoshito Hanayama, Naosumi Tada, Kunihiko Mishima | 2004-01-20 |
| 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 |