Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6478898 | Method of producing tool steels | Tomoaki Sera, Masahide Umino, Yasutaka Okada | 2002-11-12 |
| 6479013 | Casting components made from a tool steel | Tomoaki Sera, Masahide Umino | 2002-11-12 |
| 6379821 | Martensitic stainless steel welded pipe | Takahiro Kushida, Tomohiko Omura, Kazuhiro Ogawa, Masahiko Hamada | 2002-04-30 |