Granted Patent
Utility
US 5,331,850 · App. 08/027,006
Apparatus for indicating the level of a material in a container
Inventor:
George J. Loos
Patented Case
View Patent ↗
Granted: Jul 26, 1994
Filed: Mar 5, 1993
Inventor
George J. Loos
Assignee (at issue)
Arkwin Industries Incorporated
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.