Granted Patent
Utility
US 5,697,248 · App. 08/185,836
Liquid level sensor
Inventor:
Richard H. Brown
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: May 10, 1994
Inventor
Richard H. Brown
Assignee (at issue)
Whitaker & Company
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.