Granted Patent
Utility
US 5,000,421 · App. 07/367,976
Electromagnetic solenoid valve with variable force motor
Inventors:
John L. Hendrixon, David Domanchuk, Allen Pearson
Patented Case
View Patent ↗
Granted: Mar 19, 1991
Filed: Jun 19, 1989
Inventors
John L. Hendrixon
David Domanchuk
Allen Pearson
Assignee (at issue)
SPX Corporation
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.