Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6634033 | Rotating damper | Tsuyoshi Mizuno, Kazuyoshi Oshima | 2003-10-21 |
| 4938322 | Multi-disc damper using viscous fluid | Seiji Sugasawara, Ken Tsuneki, Kazuyoshi Ohshima, Tatsuya Hayakawa, Seiichiroh Tamura | 1990-07-03 |