Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6761853 | Free-cutting tool steel | Kiyohito Ishida, Katsunari Oikawa, Yukinori Matsuda, Kozo Ozaki, Seiji Kurata +1 more | 2004-07-13 |
| 5279688 | Steel shaft material which is capable of being directly cut and induction hardened and a method for manufacturing the same | Kenji Isokawa, Sadayuki Nakamura | 1994-01-18 |
| 4901582 | Fixture for brittle pre-crack introduction in ceramic specimen | Tetsuro Nose | 1990-02-20 |