Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855547 | Vacuum interrupter | Hideaki Toya | 1989-08-08 |
TH
Tatsuya Hayashi
Overall (1989): #53,632 of 140,708Top 40%
1
Patents 1989