Granted Patent
Utility
US 5,847,550 · App. 08/862,177
Exit sign having a pulse switching tandem flyback voltage converter and a backup battery
Inventors:
David Schie, James A. Rekowski
Patented Case
View Patent ↗
Granted: Dec 8, 1998
Filed: May 22, 1997
Inventors
David Schie
James A. Rekowski
Assignee (at issue)
Juno Lighting, Inc.
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.