Granted Patent
Utility
US 5,669,956 · App. 08/381,968
Apparatus and method for molten metal depth detection
Inventors:
James A. Behring, William Falk
Patented Case
View Patent ↗
Granted: Sep 23, 1997
Filed: May 22, 1996
Inventors
James A. Behring
William Falk
Assignee (at issue)
MIDWEST INSTRUMENT 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.