Granted Patent
Utility
US 5,155,472 · App. 06/885,326
Contact type liquid level sensing system
Inventor:
Naim Dam
Patented Case
View Patent ↗
Granted: Oct 13, 1992
Filed: Jul 14, 1986
Inventor
Naim Dam
Assignee (at issue)
Introtek International, 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.