Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878473 | Internal combustion engine with electronic air-fuel ratio control apparatus | Shinpei Nakaniwa | 1989-11-07 |
| 4854288 | Air-fuel ratio control apparatus in internal combustion engine | — | 1989-08-08 |