Granted Patent
Utility
US 4,509,491 · App. 06/547,949
Overflow valve for distributor-type fuel injection pumps
Inventor:
Hisatsugu Kawatei
Patented Case
View Patent ↗
Granted: Apr 9, 1985
Filed: Nov 2, 1983
Inventor
Hisatsugu Kawatei
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.