Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6024913 | Precision quenching apparatus and method with induction heating | Yasuharu Ogawa, Daiji Itoh, Yoshimasa Tanaka | 2000-02-15 |
| 5488219 | Induction heating coil assembly and method for hardening inner surface of cylinder by using the same | Yoshimasa Tanaka | 1996-01-30 |