Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880374 | Filter exchange device for an extrusion molding machine | Ken Hamamura, Mitsuhiro Goto | 1989-11-14 |
SK
Sei Kawahara
Overall (1989): #58,515 of 140,708Top 45%
1
Patents 1989