Granted Patent
Utility
US 5,869,558 · App. 08/863,323
Black electrophoretic particles and method of manufacture
Inventor:
Wei-Hsin Hou
Patented Case
View Patent ↗
Granted: Feb 9, 1999
Filed: May 27, 1997
Inventor
Wei-Hsin Hou
Assignee (at issue)
Copytele, 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.