Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870586 | Air-fuel ratio control system for an internal combustion engine with an engine load responsive correction operation | Masahiko Asakura, Masahiro Ueda, Shinichi Kubota, Tomohiko Kawanabe, Noritaka Kushida +1 more | 1989-09-26 |
| 4804454 | Oxygen concentration sensing apparatus | Masahiko Asakura, Yasunari Seki, Minoru Muroya | 1989-02-14 |