Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8690972 | Hydrogen production system and reforming apparatus | Yoshinori Takata, Toshihiko Sumida | 2014-04-08 |
| 8480770 | Hydrogen production system and method of controlling flow rate of offgas in the system | Toshihiko Sumida, Hidenori Minami, Yoshinori Ueda | 2013-07-09 |
| 8298305 | Hydrogen production system and method of controlling flow rate of offgas in the system | Toshihiko Sumida, Hidenori Minami, Yoshinori Ueda | 2012-10-30 |
| 8048177 | Method for treatment of drain in hydrogen production and hydrogen production system | Toshihiko Sumida, Yoshinori Takata, Yoshiaki Imoto | 2011-11-01 |
| 7438746 | Off-gas feed method and target gas purification system | Toshihiko Sumida, Hiroaki Sasano | 2008-10-21 |
| 6913638 | Method for separating hydrogen gas | Toshihiko Sumida, Hiroaki Sasano | 2005-07-05 |
| 5755856 | Process of recovering oxygen-enriched gas | Kazuo Haruna, Hiroaki Sasano | 1998-05-26 |