Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870733 | Manufacturing method of a piston for an internal combustion engine | Soichi Hara | 1989-10-03 |
YK
Yasuhiro Kawabata
Overall (1989): #42,106 of 140,708Top 30%
1
Patents 1989