Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824336 | Vacuum pump | Akio Matsumoto, Kimiaki Seki | 1989-04-25 |
YI
Yoshiyuki Iwaki
Overall (1989): #41,095 of 140,708Top 30%
1
Patents 1989