Granted Patent
Utility
US 5,374,489 · App. 08/037,101
Organic electroluminescent device
Inventors:
Kunio Imai, Takeo Wakimoto, Yasuhiko Shirota, Hiroshi Inada, Tomokazu Kobata
Patented Case
View Patent ↗
Granted: Dec 20, 1994
Filed: Mar 26, 1993
Inventors
Kunio Imai
Takeo Wakimoto
Yasuhiko Shirota
Hiroshi Inada
Tomokazu Kobata
Assignees (at issue)
Pioneer Electronic Corporation
Yasuhiko Shirota
BANDO CHEMICAL INDUSTRIES, 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.