Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4508076 | Idling speeding control system for internal combustion engine | Hideki Tanaka, Sadashichi Yoshioka, Katsuhiko Yokooku | 1985-04-02 |
| 4471745 | Exhaust gas recirculation system for internal combustion engine | Sadashichi Yoshioka, Yoshitaka Nomoto, Katsuhiko Yokooku | 1984-09-18 |
| 4215539 | Exhaust gas purifying apparatus for automobile multi-cylinder engine | Kazuyuki Tanaka | 1980-08-05 |
| 4215540 | Exhaust gas purifying apparatus for automobile multi-cylinder engine | Kazuo Kobayashi, Tadataka Nakazumi, Kazuyuki Tanaka | 1980-08-05 |
| 4215541 | Dual-catalyst exhaust gas purifying apparatus for multi-cylinder engine | Kazuyuki Tanaka, Kazuo Kobayashi, Tadataka Nakazumi | 1980-08-05 |
| 4215542 | Exhaust gas purifying apparatus for automobile multi-cylinder engine | Kazuo Kobayashi, Tadataka Nakazumi, Kazuyuki Tanaka | 1980-08-05 |