Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4805574 | Ignition timing control system for an internal combustion engine | Katsuhiko Sakamoto, Kouichi Hatamura | 1989-02-21 |
YO
Yoshinori Okino
Overall (1989): #40,465 of 140,708Top 30%
1
Patents 1989