Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8007176 | Dynamic pressure bearing and rotation machine employing same | Akira Yamamura | 2011-08-30 |
| 6305694 | Ferrofluid sealing device | Noboru Yamazumi | 2001-10-23 |
| 6290233 | Sealing apparatus | Akira Yamamura, Hirohisa Ishizaki | 2001-09-18 |