Granted Patent
Utility
US 4,809,749 · App. 07/129,758
Solenoid valve
Inventor:
Kouji Ichihashi
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Dec 7, 1987
Inventor
Kouji Ichihashi
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.