Granted Patent
Utility
US 6,805,977 · App. 10/104,013
Condensed eight-ring aromatic compound, and organic EL element and organic EL display using the same
Inventors:
Wataru Sotoyama, Hiroyuki Sato, Azuma Matsuura, Toshiaki Narusawa
Patented Case
View Patent ↗
Granted: Oct 19, 2004
Filed: Mar 25, 2002
Inventors
Wataru Sotoyama
Hiroyuki Sato
Azuma Matsuura
Toshiaki Narusawa
Assignee (at issue)
Fujitsu Limited
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.