Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6464203 | Swing-door gate valve | Tsuneo Ishigaki, Ikuo Kanzaka | 2002-10-15 |
| 6433308 | High vacuum valve | Tsuneo Ishigaki, Keiichi Shibuya, Mamoru Fukuda | 2002-08-13 |
| 6390449 | Gate valve | Tsuneo Ishigaki, Ikuo Kanzaka | 2002-05-21 |