Granted Patent
Utility
US 4,494,513 · App. 06/510,875
Fuel injection pump for internal combustion engines, free from erosion of the pump housing
Inventor:
Keizi Torizuka
Patented Case
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Granted: Jan 22, 1985
Filed: Jul 5, 1983
Inventor
Keizi Torizuka
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.