Granted Patent
Utility
US 5,938,172 · App. 08/992,090
Solenoid valve drive system
Inventors:
Masuhiro Ohtsuka, Tsuneo Adachi
Patented Case
View Patent ↗
Granted: Aug 17, 1999
Filed: Dec 17, 1997
Inventors
Masuhiro Ohtsuka
Tsuneo Adachi
Assignee (at issue)
Zexel GmbH
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.