Granted Patent
Utility
US 5,381,554 · App. 08/196,414
Uninterrupted power supply (UPS) system interfacing with communications network
Inventors:
Dale R. Langer, G. John Messer
Patented Case
View Patent ↗
Granted: Jan 10, 1995
Filed: Feb 15, 1994
Inventors
Dale R. Langer
G. John Messer
Assignee (at issue)
Exide Electronics Corporation
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.