Granted Patent
Utility
US 6,400,492 · App. 09/592,439
Electrophoretic display liquid, and electrophoretic display medium, method and device using the liquid
Inventors:
Mitsunobu Morita, Shigeyuki Harada, Kunio Hayakawa
Patented Case
View Patent ↗
Granted: Jun 4, 2002
Filed: Jun 12, 2000
Inventors
Mitsunobu Morita
Shigeyuki Harada
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.