Granted Patent
Utility
US 6,131,471 · App. 08/924,228
Liquid level sensor
Inventors:
Ronald W. Okoren, Ali S. Ameen, Matthew A. Shepeck
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: Sep 5, 1997
Inventors
Ronald W. Okoren
Ali S. Ameen
Matthew A. Shepeck
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.