Granted Patent
Utility
US 5,315,533 · App. 07/702,733
Back-up uninterruptible power system
Inventors:
Frederick A. Stich, Donald K. Zahrte, Sr., Richard V. Baxter, Jr., Douglas C. Folts, Thomas Hubert, Juan Manuel Medina, William J. Hazen, Edward G. Beistle
Patented Case
View Patent ↗
Granted: May 24, 1994
Filed: May 17, 1991
Inventors
Frederick A. Stich
Donald K. Zahrte, Sr.
Richard V. Baxter, Jr.
Douglas C. Folts
Thomas Hubert
Juan Manuel Medina
William J. Hazen
Edward G. Beistle
Assignee (at issue)
Best Power Technology, Incorporated
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.