Granted Patent
Utility
US 5,798,849 · App. 08/744,215
Multilevel light source device
Inventor:
Jem-Tsair Tsai
Patented Case
View Patent ↗
Granted: Aug 25, 1998
Filed: Nov 5, 1996
Inventor
Jem-Tsair Tsai
Assignee (at issue)
Mustek Systems 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.