Granted Patent
Utility
US 4,838,080 · App. 07/186,076
Circuit for distinguishing detected lift signal of the valve element of fuel injection valve
Inventor:
Masami Okano
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Apr 25, 1988
Inventor
Masami Okano
Assignee (at issue)
Diesel Kiki 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.