Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7748948 | Vortex-flow blower device | Shinichi Yokoyama, Masaki Sakata | 2010-07-06 |
| 7575410 | Electric air pump apparatus and evaporation fuel treatment system | Akikazu Uchida, Hiroshi Nakamura, Shinichi Yokoyama, Yasunori Kobayashi | 2009-08-18 |
| 7032375 | Secondary air supply system | Shinichi Yokoyama | 2006-04-25 |
| 5632258 | Exhaust gas recirculation control apparatus for an internal combustion engine | Hiroo Tsujimoto, Yukihiko Takeuchi, Shiro Maeda | 1997-05-27 |
| 4598729 | Negative pressure control valve | Mitikatu Naito, Kiyotosi Yano, Kazuo Itou, Masaaki Tanaka, Michio Kawagoe | 1986-07-08 |
| 4440139 | Vacuum control valve | Mitikatu Naito, Kiyotosi Yano, Kazuo Itou | 1984-04-03 |