Granted Patent
Utility
US 5,691,692 · App. 08/591,331
Portable machine with machine diagnosis indicator circuit
Inventor:
Dale R. Herbstritt
Patented Case
View Patent ↗
Granted: Nov 25, 1997
Filed: Jan 25, 1996
Inventor
Dale R. Herbstritt
Assignee (at issue)
Ingersoll-Rand 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.