Granted Patent
Utility
US 6,684,867 · App. 09/796,717
Ignition apparatus for internal combustion engine and one-chip semiconductor for internal combustion engine igniting
Inventors:
Takashi Ito, Katsuaki Fukatsu, Ryoichi Kobayashi, Noboru Sugiura
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Mar 2, 2001
Inventors
Takashi Ito
Katsuaki Fukatsu
Ryoichi Kobayashi
Noboru Sugiura
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.