Granted Patent
Utility
US 6,816,146 · App. 09/741,339
Electrophoretic display liquid and electrophoretic display medium and device using the liquid having predetermined different volume medium particle diameters
Inventors:
Shigeyuki Harada, Mitsunobu Morita, Kunio Hayakawa
Patented Case
View Patent ↗
Granted: Nov 9, 2004
Filed: Dec 21, 2000
Inventors
Shigeyuki Harada
Mitsunobu Morita
Kunio Hayakawa
Assignee (at issue)
RICOH COMPANY, 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.