Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7014812 | Sulfur-containing free-cutting steel for machine structural use | Tatsuo Fukuzumi, Motoki Watanabe, Tsuneo Yoshimura | 2006-03-21 |
| 5951944 | Lowly decarburizable spring steel | Hiroharu Motomura | 1999-09-14 |
| 5183634 | High strength spring steel | Tsuyoshi Abe, Nobumasa Umezawa, Tatsuo Fukuzumi, Junji Ozaki, Hiroharu Motomura | 1993-02-02 |
| 5118469 | High strength spring steel | Tsuyoshi Abe, Nobumasa Umezawa, Tatsuo Fukuzumi | 1992-06-02 |