Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6805152 | Poppet valve with heater | Ikuo Kanzaka | 2004-10-19 |
| 6796545 | Poppet valve seal mechanism | Akira Enzaki, Toyonobu Sakurai | 2004-09-28 |
| 6708721 | Vacuum valve with heater | Toyonobu Sakurai | 2004-03-23 |