Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4222237 | Exhaust gas purifying apparatus for internal combustion engine | Tokio Kohama, Hideki Obayashi, Hidetaka Nohira | 1980-09-16 |
| 4221639 | Aluminium alloy cylinder and manufacturing method thereof | Chikato Ninagawa, Minoru Yonekawa, Hitoshi Harada | 1980-09-09 |
| 4196706 | Exhaust gas recirculation system for internal combustion engine | Tokio Kohama, Hideki Obayashi, Hidetaka Nohira | 1980-04-08 |
| 4181110 | Exhaust gas recirculation system for internal combustion engine | Tokio Kohama, Hideki Obayashi, Hidetaka Nohira | 1980-01-01 |