Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9905869 | Fuel cell system and method of controlling the same | Kenji Umayahara, Atsushi Imai | 2018-02-27 |
| 9142846 | Fuel cell system and fuel cell activation method | Atsushi Imai | 2015-09-22 |
| 8999591 | Fuel cell system for preventing excessive power generation | Kenji Umayahara | 2015-04-07 |
| 8722266 | Fuel cell system | Kenji Umayahara, Michio Yoshida | 2014-05-13 |
| 8420269 | Fuel cell system | Atsushi Imai | 2013-04-16 |
| 8400101 | Power supply control circuit | Michio Yoshida | 2013-03-19 |
| 8273490 | Fuel cell system | Kenji Umayahara, Atsushi Imai | 2012-09-25 |
| 8268495 | Controller in a fuel cell system that controls the measurement of AC impedance and drives the DC/DC converter | Kota Manabe, Takahiko Hasegawa | 2012-09-18 |
| 8159850 | Converter control device | Kota Manabe, Takahiko Hasegawa | 2012-04-17 |
| 7947403 | Fuel cell system | — | 2011-05-24 |
| 7633783 | Converter control device | Kota Manabe, Takahiko Hasegawa | 2009-12-15 |
| 7305871 | Cylinder discriminating device and method thereof, and engine ignition control device and method thereof | Hiroshi Arita, Takahiro Aki | 2007-12-11 |