Granted Patent
Utility
US 6,591,809 · App. 10/298,579
Throttle device for internal-combustion engine
Inventors:
Yasuo Saito, Yoshikatsu Hashimoto, Eisuke Wayama, Toshifumi Usui
Patented Case
View Patent ↗
Granted: Jul 15, 2003
Filed: Nov 19, 2002
Inventors
Yasuo Saito
Yoshikatsu Hashimoto
Eisuke Wayama
Toshifumi Usui
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.