Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839831 | Oil degradation warning system | Minoru Imajo | 1989-06-13 |
TK
Tsunehiro Kawakita
Overall (1989): #47,514 of 140,708Top 35%
1
Patents 1989