Granted Patent
Utility
US 6,286,491 · App. 09/431,161
Ignition apparatus and an ignition control system of an internal combustion engine and IGBT of an internal combustion engine
Inventors:
Katsuaki Fukatsu, Ryoichi Kobayashi, Takashi Ito
Patented Case
View Patent ↗
Granted: Sep 11, 2001
Filed: Nov 1, 1999
Inventors
Katsuaki Fukatsu
Ryoichi Kobayashi
Takashi Ito
Assignees (at issue)
HITACHI, LTD.
HITACHI CAR ENGINEERING CO., LTD.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.