Granted Patent
Utility
US 6,461,747 · App. 09/621,740
Heterocyclic compounds, materials for light emitting devices and light emitting devices using the same
Inventors:
Hisashi Okada, Toshihiro Ise
Patented Case
View Patent ↗
Granted: Oct 8, 2002
Filed: Jul 21, 2000
Inventors
Hisashi Okada
Toshihiro Ise
Assignee (at issue)
Fuji Photo Co., 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.