Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11319605 | Heat treatment apparatus and heat treatment method | Wataru Yoshida, Katsuhiko Kizawa, Takashi Sada, Tsuyoshi Mikami | 2022-05-03 |
| 10538821 | Heat treatment apparatus and heat treatment method | Wataru Yoshida, Katsuhiko Kizawa, Takashi Sada, Tsuyoshi Mikami | 2020-01-21 |
| 10190185 | Hardening method of annular workpiece | Tsuyoshi Mikami, Katsuhiko Kizawa | 2019-01-29 |
| 9709099 | Bearing ring and rolling bearing | Wataru Yoshida, Katsuhiko Kizawa, Takashi Sada | 2017-07-18 |
| 8640341 | Method of producing rolling sliding member | Katsuhiko Kizawa | 2014-02-04 |