Granted Patent
Utility
US 5,009,075 · App. 07/511,706
Fault determination test method for systems including an electronic expansion valve and electronic controller
Inventor:
Ronald W. Okoren
Patented Case
View Patent ↗
Granted: Apr 23, 1991
Filed: Apr 20, 1990
Inventor
Ronald W. Okoren
Assignee (at issue)
American Standard 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.