Granted Patent
Utility
US 4,635,201 · App. 06/619,036
Apparatus for detecting amount of change in rotational speed of internal combustion engine
Inventor:
Kouichi Izumi
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Jun 11, 1984
Inventor
Kouichi Izumi
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.