Granted Patent
Utility
US 4,468,170 · App. 06/385,434
Low level indicator
Inventor:
Richard E. Hanset
Patented Case
View Patent ↗
Granted: Aug 28, 1984
Filed: Jun 7, 1982
Inventor
Richard E. Hanset
Assignee (at issue)
Beta Technology, 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.