Granted Patent
Utility
US 4,763,872 · App. 07/071,258
Operating oil introduction type electromagnetic valve
Inventors:
Koji Ichihashi, Toshihiro Murayama
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Jul 8, 1987
Inventors
Koji Ichihashi
Toshihiro Murayama
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.