Granted Patent
Utility
US 4,905,729 · App. 06/873,374
Constant pressure type delivery valve for fuel injection pump
Inventor:
Kazuya Kawamura
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Jun 12, 1986
Inventor
Kazuya Kawamura
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.