Granted Patent
Utility
US 5,726,535 · App. 08/630,166
LED retrolift lamp for exit signs
Inventor:
Ellis Yan
Patented Case
View Patent ↗
Granted: Mar 10, 1998
Filed: Apr 10, 1996
Inventor
Ellis Yan
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.