Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8899968 | Combustible gas processing system and combustible gas processing method | Kenji Seki, Masataka Masuda, Hirofumi Ohtsuka, Katsuhiko Hirao | 2014-12-02 |
| 8328913 | Flammable gas concentration system | Katsuhiko Hirao, Kenji Seki | 2012-12-11 |
| 8262771 | Flammable gas concentration device and flammable gas concentration method | Kenji Seki, Katsuhiko Hirao | 2012-09-11 |