Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4946345 | Turbo-molecular pump | Katsuhide Watanabe | 1990-08-07 |
| 4920290 | Active magnetic bearing apparatus | Chikara Murakami, Atsushi Nakajima, Hirokuni Hiyama, Katsuhide Watanabe | 1990-04-24 |