Granted Patent
Utility
US 5,901,057 · App. 09/013,431
Uninterruptible power supply with fault tolerance in a high voltage environment
Inventors:
Gerald J. Brand, Don L. Drinkwater
Patented Case
View Patent ↗
Granted: May 4, 1999
Filed: Jan 26, 1998
Inventors
Gerald J. Brand
Don L. Drinkwater
Assignee (at issue)
Digital Equipment 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.