Granted Patent
Utility
US 5,771,933 · App. 08/800,142
Three-position solenoid valve
Inventors:
Osamu Akamatsu, Kazunori Morimoto
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Feb 13, 1997
Inventors
Osamu Akamatsu
Kazunori Morimoto
Assignee (at issue)
NABCO, Inc.
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.