Granted Patent
Utility
US 4,440,135 · App. 06/367,681
Fuel injection system provided with fuel injection valves having controllable valve opening pressure
Inventor:
Toshiaki Asami
Patented Case
View Patent ↗
Granted: Apr 3, 1984
Filed: Apr 12, 1982
Inventor
Toshiaki Asami
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.