Granted Patent
Utility
US 5,841,359 · App. 08/832,335
Visual alarm gauge
Inventor:
Henry G. Grilk
Patented Case
View Patent ↗
Granted: Nov 24, 1998
Filed: Mar 26, 1997
Inventor
Henry G. Grilk
Assignee (at issue)
Datcon 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.