Granted Patent
Utility
US 6,539,657 · App. 09/851,646
Universal edge-lit exit sign
Inventors:
Nathan C. Qualls, Jr., Jason Davis
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: May 9, 2001
Inventors
Nathan C. Qualls, Jr.
Jason Davis
Assignee (at issue)
GENLYTE THOMAS GROUP, LLC
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.