Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6478043 | Opening/closing valve | — | 2002-11-12 |
| 6464203 | Swing-door gate valve | Ikuo Kanzaka, Kenji Waragai | 2002-10-15 |
| 6433308 | High vacuum valve | Keiichi Shibuya, Mamoru Fukuda, Kenji Waragai | 2002-08-13 |
| 6390449 | Gate valve | Kenji Waragai, Ikuo Kanzaka | 2002-05-21 |