Granted Patent
Utility
US 6,514,328 · App. 09/497,947
Marking ink composition and display medium using the same
Inventors:
Ikuo Katoh, Hitoshi Kondoh, Kunio Hayakawa, Mitsunobu Morita, Kyohji Tsutsui, Takashi Okada
Patented Case
View Patent ↗
Granted: Feb 4, 2003
Filed: Feb 4, 2000
Inventors
Ikuo Katoh
Hitoshi Kondoh
Kunio Hayakawa
Mitsunobu Morita
Kyohji Tsutsui
Takashi Okada
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.