Granted Patent
Utility
US 5,487,953 · App. 08/309,538
Organic electroluminescent device
Inventors:
Yasuhiro Shirota, Hiroshi Inada, Yoshinobu Yonemoto, Takeo Wakimoto, Kunio Imai
Patented Case
View Patent ↗
Granted: Jan 30, 1996
Filed: Sep 20, 1994
Inventors
Yasuhiro Shirota
Hiroshi Inada
Yoshinobu Yonemoto
Takeo Wakimoto
Kunio Imai
Assignees (at issue)
Pioneer Electronic Corporation
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.