Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9303768 | Valve stem seal device | Kokichi Hamamoto | 2016-04-05 |
| 7789210 | Sealing device | Kiichiro Goto, Ken Yoshikawa, Shinji Nagasawa, Yoshiyuki Kanzaki, Yasushi Sugiyama +1 more | 2010-09-07 |
| 5678828 | Sealing device | — | 1997-10-21 |