Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838228 | Ignition timing control apparatus | — | 1989-06-13 |
SY
Shuuichi Yoneyama
Overall (1989): #56,447 of 140,708Top 45%
1
Patents 1989