Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4598729 | Negative pressure control valve | Mitikatu Naito, Kazuo Itou, Kunihiro Tsuzuki, Masaaki Tanaka, Michio Kawagoe | 1986-07-08 |
| 4440139 | Vacuum control valve | Mitikatu Naito, Kazuo Itou, Kunihiro Tsuzuki | 1984-04-03 |
| 4416243 | Vacuum control valve | Mitikatu Naito, Kazuo Itou | 1983-11-22 |
| 4330004 | Electromagnetic valve | Eizi Ishikawa, Shigeru Yoshiyama | 1982-05-18 |
| 4326696 | Solenoid valve | Eizi Ishikawa, Ryouichi Matsuura | 1982-04-27 |