Granted Patent
Utility
US 4,715,396 · App. 06/761,906
Proportional solenoid valve
Inventor:
Clarence D. Fox
Patented Case
View Patent ↗
Granted: Dec 29, 1987
Filed: Aug 2, 1985
Inventor
Clarence D. Fox
Assignee (at issue)
BorgWarner 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.