Granted Patent
Utility
US 6,164,856 · App. 09/415,848
Pen with self-contained illumination
Inventor:
Peter Y. K. Lo
Patented Case
View Patent ↗
Granted: Dec 26, 2000
Filed: Oct 7, 1999
Inventor
Peter Y. K. Lo
Assignee (at issue)
Excel Scientech Co., Ltd.
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.