Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9739477 | Drainage collection system | Hiroyuki Hatanaka, Koji Nagai, Tomohiro Ookubo, Tetsuji Namato | 2017-08-22 |
| 9500360 | Closed drain recovery system | Tomohiro Ookubo, Tatsuki Kobayashi, Hiroyuki Hatanaka | 2016-11-22 |