Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879967 | Separator manufacturing apparatus for forming a separator plate having ribs of resinous material on a base sheet | — | 1989-11-14 |
YS
Yukinori Sengoku
Overall (1989): #39,355 of 140,708Top 30%
1
Patents 1989