Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6796545 | Poppet valve seal mechanism | Akira Enzaki, Mamoru Fukuda | 2004-09-28 |
| 6772989 | Maintenance-easy two-port valve | Akira Enzaki | 2004-08-10 |
| 6748969 | Poppet valve with heater | Ikuo Kanzaka | 2004-06-15 |
| 6708721 | Vacuum valve with heater | Mamoru Fukuda | 2004-03-23 |