Granted Patent
Utility
US 5,245,873 · App. 07/536,951
Capacitance-type material level indicator and method of operation
Inventors:
George H. Fathauer, Charles F. Hood
Patented Case
View Patent ↗
Granted: Sep 21, 1993
Filed: Jun 11, 1990
Inventors
George H. Fathauer
Charles F. Hood
Assignee (at issue)
Berwind 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.